Do you really think that capitalists cannot subvert a republican form of government, or that they cannot thrive under a despot?
We know that as pluralist societies developed in the Reformed Christian nations, the Roman Church did everything it could, including war and assassination, to strangle republicanism in its crib, even with enlightened monarchs like Elizabeth who were inclined to live and let live.
We know that the Church has attempted from its inception to subvert the United States of America, founded by its mortal enemies, Freethinkers and Freemasons. We know that the Roman Church was so alarmed by the whole idea of freedom of conscience, it even coined a special phrase to describe the heresy: Americanism.
Leo XIII was egregiously wrong then, as Francis is now.
We also know that the Roman Church has thrived quite well under despots. So I understand what motivates your question.
The short answer is: capitalists have tried to do that, and have largely failed. In the few cases where they've succeeded, they haven't survived for very long, because they've destroyed the foundations of economic liberty, without which capitalism can't survive, and vice versa.
Can capitalism thrive under despotism? That would seem to be what you're arguing in favor of, but unfortunately for you thesis, you cannot cite for me an example of a place where citizens are not free and capitalism has flourished. You think a handful of businessmen in China permitted to ply their trade is "capitalism." It's not. It's fascism. Failing to understand why this is wrong, you fall into the same trap as your Church and its left-wing Society of Jesus.