It’s certainly true that power corrupts, but it’s more true that the corrupt are drawn to power, so ultimately it doesn’t matter whether power is concentrated in government or in the market. (Assuming that “government” and “market” can be distinguished, which I doubt.) Wherever power is, the corrupt will be drawn to it by an irresistible magnetic force. So the only answer is to reduce the scope of power everywhere. That’s why I’m drawn to anarchism.
Anarchism is the only possible means by which metaphysical capitalism might be resisted. By promoting emergent order it promotes cooperation and negotiation, which are forms of actual relationship that involve us in The Great Economy. Libertarianism, by contrast, leaves us related to one another only in the market economy, which means not truly related at all — just oppositionally positioned in a zero-sum game.