A project to change constitutions needs to be pushed by politicians. But politicians suck, which implies they will not be inclined to push for constitution changes.
Well.. it doesn't HAVE to be. But the alternative is revolution, which is often (always?) much worse than the sucky system in the first place. That's why we are stuck here.
But I do think it's possible to have change. I am an optimist. But first we need to try different things on a smaller scale. Municipalities is a good level.
So the system converges to a suck-state.