Because if walmart workers unite they are going to have union walk right in and tell management how workers should be treated because management are on a power trip make the worker heads go every which way and cut hour for full time to 35 hours no over time and hire more part timer so they don't have to pay them holiday pay and medical. Ive heard of them fire 10 year workers and then in the same breath offer them to come back in 30 days at lower wages. If you are a outside and work for the company and transfer from another store don't think you will move up it wont happen.