That or, as rich people loose more and more of their political capital, workers get empowered and use direct action (such as strikes) to demand the end of more and more capitalistic policies, until there are none left. The rich get along with it because the alternative is loose everything.
Or capitalism ends in a big messy fight.
Edit: And today's industrial society is quite far from being capitalist. Feudalism is more close to reality, seeing as the one most important factor for almost everything in life is whether you own real estate or not.