[bluecalm]

Tax consumption, land, pollution and using natural resources. Allow people to get some amount of consumption tax back every month to make the system progressive. Get rid of all income taxes. Make sure there is inflantion as a form of tax on stashed cash as well.

Consumption tax is much harder to gain than income taxes. Corporations pay in the country they sell to so that closed all tax heaven loopholes instantly. Making the system progressive is easy as well, just allow every citizen to bring receipts up to X$ per month to the taxman and get the money back. If you really want you can tax luxury items at higher rate as well.