Paying employees better than the industry average appears to be a tactic that works. Costco has seen similar results doing the same. But of course we the customer play a role in this as well.
If the customer can’t be bothered to care about how a company treats their employees, in order to save a few dimes on a product, then the customer shares responsibility. That of course depends on whether you ascribe to the notion that we all “vote with our wallet” in a capitalist economy.