This is true to some extent, but most people have something to complain about. No doubt our society is driven by greed, which will eventually be the destruction. Either way capitalist or socialist we are looking at a revolution. Capitalists are looking for profit, and if we give way to government control as in a socialist society, then the result will be the same. Look at it this way: when was the last time anyone said our government was managing our money effectively?
If we give way to socialism, then we are trading pawns. Our government's greed will do no better, than the greed of a capitalist society. Either way human natures tendency for greed will lead to our own destruction.