I assume he had significant income in previous years, switched jobs for whatever reason, makes significantly less, but alimony is based on past few years income

I assume he had significant income in previous years, switched jobs for whatever reason, makes significantly less, but alimony is based on past few years income. That must hurt but I think is done to protect the other person since some people might purposefully quit etc in order to have alimony be set at a lower amount, then get a new job after divorce to match what they were making previously.