In order to have negotiating power as an employee there must be scarcity of labor for those skills. Considering that debt is effectively free, any seemingly lucrative field can be quickly inundated with additional supply of skilled labor.

The only way out of this is to have skills which are extremely rare owing to lack of training paths, rapidly changing execution skills, or demand which rapidly outstrips training capacity.

e.g. Software Engineer with experience in the latest X, NeuroSurgeon, Software Engineer with experience on hyperscale services etc.