Yes so exploited that the employees routinely rank it as one of the best places to work almost every single year. In N Out pays their employees more than 5 guys, by a fucking lot. Last I checked the starting wages at In N Out was $15/hour while 5 guys is barely minimum wage. Store managers at In N Out make 6 figures easy. Full time employees have access to 401k and profit sharing, dental, medical, and vacation accrual. Every single body in that company is promoted from within and all that way up the corporate ladder is people who started by mopping floors at some point.
I don't really care if you like some other hamburger better than another, but you're talking out your ass if you think In N Out keeps its prices lower with unhappy employees.
https://www.glassdoor.com/Overview/Working-at-In-N-Out-Burger-EI_IE14276.11,26.htm
https://eatpallet.com/how-is-in-n-out-so-cheap/
https://www.inc.com/bill-murphy-jr/managers-at-in-n-out-burger-make-160000-a-year-heres-how-it-works.html
https://www.indeed.com/cmp/In--n--out-Burger/salaries
How so?