It is because Walmart is either not offering $200k per year, and/or the $200k is based on working 80 hours per week with variable schedules where one should expect to be interrupted during dinner and weekends and nights.

It is always the same story with restaurant/hotel/airline/retail/hospital work. Complaints about struggling to hire while paying peanuts relative to the shit quality of life of those jobs.

Especially for any “manager” or “supervisor” level position, which is just code for “you are the person responsible for filling in when someone calls out”. And someone will call out because the pay for the subordinates will always be insufficient to attract reliable, quality line level workers.