I wonder if something similar is happening with wages. Because of the minimum wage, a business owner can hire someone to the minimum wage, or something slightly above, without too much thought other than knowing they can afford it generally. So the minimum may be artificially "sticking" wages lower than what they may otherwise be. Of course this is all conjecture and I have no kind of proof for this.
Also, while minimum wage laws are almost universally praised, they (along with a lot of things in the US) have a pretty sad history. https://mises.org/blog/racist-history-minimum-wage-laws