This is a 2 parter.
1. Walmart has done this before. Ir raises the pay for new hire only. When the raises happen, the long term employee will end up making less than the new hire. This isn't a decision by Walmart Store Management, it's a Corporate Decision. Not the first time for walmat and they do a great PR. Lousy company to work for but great PR.
2. If you raise the workers salaries, the Distributors raise their prices, pass it onto the stores and they pass it onto the customer. It's all about greed. The Rich are be damned not going to let you cut into the pie since they own almost all of it. Not one iota. The end result is, the worker gets a raise, the cost of living goes up exactly or more than their raise and they are not in a nigher tax bracket. Until this is dealt with then pay increases for the middle class and down do more damage than good.
Unless the distributors, housing owners, etc. are told to knock it off then it's only going to get worse.