I like the experimentalness of it too, plus the fact that it goes against certain moral intuitions that have proven themselves rather fruitless in practice (bootstraps, blah blah). Real leaps tend to be counterintuitive. It does worry me that it seems dangerously write-only.

You wouldn't necessarily have to pay an extra if we cut down on public services and let people manage their money.

While this is a perfectly logical statement, there's absolutelty no chance it would reduce the cost of public services in reality. We don't fire government workers, they just get new titles / department names.

If anything the public service costs would increase as new oversight commities and other completely useless entities were created to manage the migration from our current system.

Bureaucrats need jobs, too.