An interesting thing to say!
Are you trying that old teacher trick of saying something utterly preposterous to see if anybody in the class is still awake?
Is there anybody nodding off at the back who can't see that the truth is almost exactly the opposite?
In fact civilisation has largely come about by a process of
taking wealth and power away from where it was historically concentrated in the hands of the few - kings, emperors, land owning oligarchs, other tyrants, etc etc.
Start where you like, Magna Carta, The Charter of the Forest, the fight for the vote, the growth of the labour movement to improve conditions, various reform acts, strikes, revolutions....etc.
We have universal suffrage in UK but only since 1928, thanks to enormous struggles and self sacrifices, going back 400 and more years. Power to the people.
We've had battles from early days for better wages and condition and public services.. and so on.
Never straightforward - moving backwards since Thatcher/Reagan and free-market ideology and "financialisation" - making us all debt slaves. Back to the jungle, but hopefully just a blip.
High taxation/redistribution is key to civilisation itself
Nobody is in pursuit of your sort of equality - it just gets trotted out as a right wing trope.
The greedy rise to the top - the scum floats to the surface etc......
Nobody proposes a "homogenous" mix - it's just that right-wing trope again, it makes no sense.
Neither stable, permanent or long term, but a continuous process of adjustment to get things working for everybody
It is in you terms, but you are talking to yourself. Most dogma comes from the right, the left is just bothered about getting things done "for the many, not the few".
Talking to yourself again!
PS absolutely non of the benefits of civilisation have come from the top, they have been fought for from the bottom, and still are being.