Huge chunks of economics are just as much garbage as the the rest of humanities because of the lack of experimental capabilities. Any field that has conflicting “schools of thought” is not really founded in evidence and reproducible experiments.
MMT and inflation theories in general are constantly brought up by politicians and they are junk science.
Piketty’s work on inequality is a glorified regression built on an unfounded assumption about the return on capital always outpacing inflation. That work dominates politicians discussing the wealth gaps and is used as “evidence” to tax the wealthy.
Some economics is great (e.g. Nash equilibrium) and is consistently reproducible and observable. That’s not the kind dominating headlines though.
