[Camisa]

I disagree, business that fire people "to make a statement" don't last. And it seems OP is just good at what he does, hence he will always have more work.

My opinion is that the company likes having OP in a desperate state because in doing so he won't have enough time to look for a job elsewhere.

[matrix_overload]

Oh, that depends. If OP is critical to their business, they normally would not fire him. Except if he sets and example for other employees, so their productivity starts dropping as well. Or if part of the manager's compensation is the right to treat reports like shit and fire them on a whim, as long as stuff gets somewhat done (i.e. a non-asshole manager would ask for more pay). Or if their entire business model is to churn through naive people by using them while they are still productive, and quickly disposing of them as they approach burnout.