What does that mean? Employers are raising wages in the free market. Unionized or not, the market is free - nobody is forcing companies to not unionize, and if

What does that mean? Employers are raising wages in the free market. Unionized or not, the market is free - nobody is forcing companies to not unionize, and if that means more employee retention then the others better follow suit if they are keen enough. There’s no monopoly on who can have a union.