What features would an ideal political system incorporate?

Every political system around today is flawed in one way or another. We all know the huge problems faced by dictatorships and communist/socialist systems. Someone once pointed out to me that capitalist based democracies have a finite lifespan, because they rely on growth, and growth can only go so far before it is crippled by overpopulation etc. I think it is time we start looking for a new political system to combat these problems.

What features should this new system have? Is it more important to promote equality, or to reward people for their work? What level of influence should the system have over day to day life?

Just brainstorming here.