that's a chicken and egg problem. People change jobs frequently mostly due to two reasons:
1. higher pay
2. to get away from bad management or a bad work environment (same thing really)
If it's the kind of place that doesn't help train new skills, that falls under "bad management". Employees could collectively try to be the better person first in fixing this, but most modern history would show that most employers if given an inch will take a mile, and will generally pay the least amount possible, expect one-sided loyalty, and overall get away with everything they can until either regulation or market forces force them to change.
If it's the kind of place that doesn't help train new skills, that falls under "bad management". Employees could collectively try to be the better person first in fixing this, but most modern history would show that most employers if given an inch will take a mile, and will generally pay the least amount possible, expect one-sided loyalty, and overall get away with everything they can until either regulation or market forces force them to change.