Those things you listed are just regulations though, and all leftists are for more of it. The grey area is when governments start to encroach too much on private enterprises. For example, I don't think it's authoritarian to demand that businesses pay a minimum wage to workers or adhere to environmental laws; however, I do think it's authoritarian to force forfeiture of all private assets and suppress opposition political parties which have been the hallmark of socialism and communism in the past.
Too much state control doesn’t eliminate exploitation, it just shifts it from corporations to an unaccountable government - and considering collectivisation is necessary to achieve the Marxist "dream", it doesn't make the theory any more attractive. I think decentralization and democratic institutions are better solutions to corporate overreach.
Y'know, I've always been dismissive of scare tactics, but maybe there's some sense in them