It's not that they can "push the communism button", but it's more like "turn the socialism dial". As the country continues to grow and establish itself, the expectation is that the dial is turned "up".

That's not to say that I think they are at the point of going full speed ahead and re-nationalizing everything, but slapping around their billionaires like this is always gonna be a big plus. Hopefully the day is near where the wealth of Chinese billionaires is reappropriated back to Chinese workers, ideally with support from the Party.