This is just partisan conspirational nonsense. Modern Economics took the useful things from Marx and left the rest in the dustbin of history like it should. Nor do Economists advocate for "trickle-down" theory, the answer has more to do with where one is on the laffer curve.
Economists clash frequently with other fields like social sciences because such fields continue to use unfalsifiable and highly flawed epistemic tools like dialectics to advocate for debunked theories like World Systems Theory.
Economists clash frequently with other fields like social sciences because such fields continue to use unfalsifiable and highly flawed epistemic tools like dialectics to advocate for debunked theories like World Systems Theory.