Retail jobs aren't meant to be bread-winner jobs. Any zero-skill job is going to pay whatever the local market minimum is.

There are two ways to raise the minimum market wage. First is minimum wage laws. Second is to increase labor demand or shorten labor supply.

There's clearly a surplus of no-skilled labor in the US, yet we're still importing more of it. Businesses are capitalizing on the market conditions and exploiting the labor surplus, that's why we're seeing the proliferation of so many chain restaurants and and other little-to-no-value businesses.