“Poverty shouldn’t exist” or “unemployment shouldn’t exist” is much better rhetoric than “billionaires shouldn’t exist.” It’s positively framed instead of antagonizing. 

And that’s exactly why nobody ever says those things.

Is just populist rhetoric 

Mamdani did a good job in interviews following these statements with a MLK quote 

When I say billionaires shouldn't exisist as a Marxist, i dont mean billionaires should be killed or any nonsense, i mean that no individual should be able to hoard wealth to such a magnitude that it impacts the working class

noooo you can't consider the quote in it's full context noooooo how dare you disrupt my gotcha commentary, every soundbite must be coherent and defensible all on its own nooooooo