Firstly we have entrenched interests who have been playing the game for generations. I'm not sure they'd be in reach of a complete revolution, never mind a constitutional change.

Secondly, nation states are idiotic and far too expensive for the (largely illusory) benefits they provide. But world government provides a single point of political failure. I have no idea how to square that circle.

Finally you need to have a system that rewards innovation, insight and creativity but keeps predatory sociopaths well away from power.

Problem is, power is inherently sociopathic. People who crave it are insane, almost by definition. But you still need to have some power differentials, because some people are simply better at things like planning and people management than others. And it makes no sense to employ the ones who don't know what they're doing.

There's also the more basic problem that human political awareness is fundamentally flawed. We don't have the genetic or evolutionary background to make smart social choices. Given a choice, the reassuring smooth-talking liars win every time.

So you need a system that makes democracy about proven performance rather than superficial demagoguery, and which is accessible and open enough to disqualify trite manipulation even if voters like it.

I don't think a financial solution is going to work. The problems are psychological and psycho-social. Money is too blunt an instrument to solve them.