Is the alternative is to give the power directly to the powerful? Not only will they hold the guns, but they decide what the markets will bear - often-enough with food for the poor becoming optional, if history has any lessons.

Which non-capitalist system does not ultimately concentrate wealth and power even further? And, if nation-states are organisms, and survival of the fittest is a law, which of those systems can survive in the real world? Excepting perhaps those propped up by a disproportionate natural wealth and homogeneous culture, where it is easier for people to continue to believe in "our good" when hard times come.

Capitalism is the only system that pretends to respect human nature - gives us a lever that says, "want more stuff? provide more value." It gives the self-interested a healthy outlet that the other systems lack. It must be managed, though, by power, and when the two collude you get fascism. So, I guess maybe I share your view, that lobbying breaks the system.