A second job is a great idea to personally combat the financial decay. I have done that over the years and even diversifying what I offer as a musician. But for many there are only so many hours in a day. I have heard of full time Walmart employees who struggle to make a living. Perhaps really diversifying how your money makes money may help. For some reason the great entrepreneurs seem to do it.
This is the crux of it -working fulltime at Walmart is not going to lead to financial success (most likely), so it is about find ways at some point to put more into making money work in the background alongside.
I can't remember the exact numbers, but it is something like the top 5% of earners work 30% more hours in a week. The argument is that it is because they earn more, they are more motivated, which is likely true - but that behavior started somewhere.