If billionaires ruined the economy in such a way that 50 percent of people couldn’t afford to feed their families

What do you mean “if”? They’re well on the way already and it’s getting worse, not better.

then I like to think that people would simply eat the billionaires.

Problem with that is that owning everything also includes bodyguards and even de facto private armies.

way too many people still think billionaires are awesome.

Unfortunately you’re absolutely right.