Purchase tax would work like reverse VAT. Companies could be awarded tax credits for their sales (not 100% though) and pay tax on their purchases. This would be harder to evade and additionally incentivise companies to do more with less which might be good for environmental transition.
Why not 100%? How is that even supposed to work in low-margin markets like construction, where the profit is 100x less than the costs, so even 1% tax would erase it? But any markets really, this makes innovation and business so risky that I'd probably close down my IT company too.
Markets will adjust, sure. It will be priced in, but that's the problem. They will become less efficient, quality will be worse, everything will be slower, more risk averse, and thus more expensive to the customer - that is necessary to survive in this new environment. That also means that people's income gets lower and grows slower.
It'd be risky because I have no idea if I'm actually going to make money or not. European states set very draconian rules like 1% daily interest on unpaid taxes - no way I'm taking this shit on.
Two factors are responsible for the bulk ens*ttification of the markets: any barriers to competition and information asymmetry between purchaser and seller. Taxation is not a factor unless it's done with too much micromanagement that incentivises doing weird things to your product/service to avoid higher tax.
VAT is already a purchase tax, just collected from the end consumer. You could just raise VAT and do away with income tax. But since the burden is on the end consumer only (not along the chain, because of 100% deductions) it would have to be raised very high. And VAT is with us long enough that many ways to exploit its edge cases were discovered. General purchase tax collected at all steps of production chain could spread the tax burden away from final consumer to the people who exploit them (aka businessmen) thus fulfilling the role that income tax currently fulfills. It would also have way less edge cases and could replace things like import tariffs and social security fees, excise taxes and many more.
> It'd be risky because I have no idea if I'm actually going to make money or not.
That's the inherent risk of business. You have to decide if it's worth it regardless of whether a server costs you $x or $x+10% purchase tax.
> European states set very draconian rules like 1% daily interest on unpaid taxes - no way I'm taking this shit on.
You would never have unpaid taxes because they'd be automatically collected by the bank at the moment of purchase. If you don't have money to pay for purchase tax you don't have money to make a purchase.
> Just do the same thing but with VAT...
We could do some of that if we reduced VAT deductions from 100%. But it would be worse because VAT is very limited and thus has a lot of edge cases where it comes in contact in systems outside it's domain. Those can be used to get away from paying by doing superfluous operations.
...or you can just use a VAT, which are also paid at purchase. Tech companies have high margins and low expenses, so if the point is to tax tech companies, taxing purchases and giving a credit to sales is literally the exact opposite of what you want to do.
VAT with 100% deduction places entire tax burden on the end consumer. Income tax aims to extract additional tax from entities that extract money from consumers for investors.
VAT could do a lot of the same things that I'm proposing (if the deductions weren't 100%) but is limited in scope. And because of that it has a lot of interfaces to other domains like real estate, import, labor, financial intruments. Interfaces that can be exploited to avoid paying taxes.
General purchase tax could replace all taxes and fees transfered from the markets to governments (and effectively goverment managed buckets like social security or public healthcare).
Taxes have this strong moral objection that they are punishment for creating value. Purchase tax could help with that by ostensibly being punishment for using up value not for creating value. It might also compose well with transition to stable state economy that will have to replace old economy based on unbounded growth.
Income taxes make everything less straight forward, more risky, more costly, just harder. Small companies are incredibly disadvantaged. If most/all income taxation could be avoided, it potentially translates to incredible productivity gains.
What are the reasons to tax corporate income? The usual reason is so that it doesn't spend the money on executive wages, parties, and so on. The less public reason is so that it doesn't extract all money to a foreign corporation through license/patent fees (dividends are taxed more).
We can do so much more today with the computers we have than the primitive taxation schemes of 1980s Europe. We already have the infrastructure to audit corporate spending and investments - let's just keep using that to avoid the lavish parties and otherwise not serving the shareholders as efficiently as possible. Let's cap wages at 200k - if you want more, get some stock options and share the risk. Any out of country value transfer (money, gold, financial assets...) is taxed 50% (each individual gets an exemption up to 100k/year). Add a 5% inflation rate to discourage cash hoarding.
Now the fun stuff - let's use Land-Value Tax and Progressive Value Added Tax - VAT with progressive rate based on item class and price. Zero rate on basic needs in raw form + everyday items like hygiene. Everything is calculated automatically using the country's E-Cash Register system - absolutely zero bureaucracy, everything is clear upfront and there is no forward risk created by taxation. And it's super hard to avoid taxes when they won't give you the new Lambo unless you pay right there and now.
Most EU countries already have all of the infrastructure in place. Though this scheme would work best in a borderless, continent-wide European state.
> The less public reason is so that it doesn't extract all money to a foreign corporation through license/patent fees (dividends are taxed more).
Purchase tax would fix it by taxing money "on exit" on foreign purchases of anything. This also works as a tariff without singling out any foreign country as a target for tariff.
> VAT with progressive rate based on item class and price.
Here's your bureaucracy. VAT classification is huge catalog that many businesses are trying to gamble to jump to lower tax rate. Creating it, updating it, adhering to it is a huge pile of decentralized and distributed bureaucracy.
What you are proposing is a spaghetti of solutions. Every interface between the parts and every solution itself is an attack surface for tax dodgers.
Genral purchase tax is unified framework on all transactions that can consistently extract money from the rich through taxing all their spending that intrudes on the markets only when you specifically wish to and gives you clear tool for intrusion in the form of tax credits for specific market actors for whatever reason you wish.