I knew about In and Out paying all of their employees a lot better than the other burger joints in SO CA back in the early 1990s, the manager at the Barstow store was making $130,000.00 a year and all of the employees where making at least $1.00 above minimum wage to start with, they would get regular raises as they got better on that job
There was very little turn over due to employees quitting to get a better job
I learned later that Burger King company stores paid way above the franchise stores paid, I knew a kid who wife was the manager at the Barstow, CA company store at the same time as the In and Out manager was getting $130,00.00 per year, she was making around $85,000.00 a year according to her husband.
I was making less than either one of them at the same time as a 1st level supervisor in customer services for the local telephone company
Sometimes it pays well to work hard, no matter where you work at