Can someone please explain to me how any Christian can be in agreement with Capitalism?

So capitalism came along LONG after christ and the bible, but it seems to me that most of the teachings of the bible are contrary to any capitalist notions. I know that the “protestant work ethic” brought us the notion of “pulling one’s self up by one’s own bootstraps” and that is supposedly the cornerstone of capitalism. but if one follows the teaching of the bible (for example, a person should give all of their excess income to the poor) then how can a christian condone capitalism?