I agree with this very much. Despite the observations (and people's incorrect intuition about tight labor, before this virus at least), there is a surplus of willing labor to do work. To the extent that part-time gig work has become a necessity for people to stay afloat. You cannnot fundamentally change the situation or get wages/labor power to increase by restricting who can work, artificially raising wages, etc. The mass action of people numbers is hard to counteract, and as long as there are way more people than required for the demand for labor, we will be in this situation.