As a general rule, middlemen provide value, which is why they exist. If they didn't we'd just disintermediate them.
We have a mechanism for getting rid of useless middlemen already, it's called capitalism. It's by no means perfect, of course, but the incentive to remove middlemen is codified in cold hard cash and shareholder value.
- Extremely costly
- Very slow
> One concept: Kill the middlemain
You're not killing middlemen. The moment you step outside blockchain, you need middlemen.
When you need someone to verify that this esoteric code actually encodes you contract, you need middlemen. etc.
> Easy, next one.
If you ignore reality, everything is easy, sure.
BTW. Contracts-as-code have been done since computers became a thing.