This is because the money is only one aspect of it—not that they don't care about money; of course they do. But they also care about the power. They especially

This is because the money is only one aspect of it—not that they don't care about money; of course they do. But they also care about the power. They especially care about entrenching the new stratified class system they've been putting into place. Single-payer healthcare would make us plebes less dependent on them, our neofeudal overlords. You can see this in things like proposals to improve working conditions. They would cost nominal amounts, and there's plenty of research that shows they would increase productivity, employee morale & retention, etc, but if they make it harder for the managers to treat the workers like unworthy peasants, they don't get done.