I don't think they's a problem with hiring workers based on market wages, but we're talking about these companies who seek to disincentivize existing remote workers and take advantage of the current situation to decrease worker salaries while keeping them on board. If your worker is remote, their location doesn't matter so long as they have a good internet connection. This all comes across as opportunistic and bordering on coercive. Honestly wage decreases in general seem exploitative since the worker doesn't really hold much bargaining power especially in an economic downturn.