Well, honest question... what's the alternative? because all the other options have proven to be worse by magnitudes of order.

Calls that it's not sustainable are like cries of impending starvation and privation... yet "famines" haven't happened because advances created by... capitalism. Better crop yields, better farm results, etc. Driven by "greedy capitalists".

can we do better? Sure... fight crony capitalism? coporatism? absolutely...

But end of day... the alternatives? have proven worse - unless you have proof otherwise and history isn't with you on that...