What's the opposite of virtue-signaling? I mean if you're praying to the supply-side gods, or campaigning for a leadership role in Monsanto, or want to represent landlords in eviction causes, well you're signal is Batman bright for all to see.
Sure, it's freaking possible to live on 20k: in a really depraved way where you have no privacy, no entertainment, no emergency funds, can't build for the future, can't have a family, probably can't go on dates. In other words your mental health is screwed, which would only likely increase your likelihood that you'd depend on public mental health services, or ignore it and cost society in some other way down the road (shall I enumerate?). But yeah, top notch point that's possible if they could only budget for their misery.
I mean why is that standard? Why shouldn't we want quality of life for all who work? The market is notoriously awful at valuing employment (human beings, which should be the prize of the end game), hence government interference in such minor things like slavery, child labor, OSHA, and yes, minimum wage.