During the Nixon years there was a "freeze" on wages, meaning they couldn't (legally) go up. Okay, so that means it must be bad (other things equal) for your wages to be frozen.
So would it be good for your wages to melt? Would you be ecstatic if your boss said, "Next month, Jim, your wages will evaporate"?
(It's true, to say your wages would boil doesn't sound bad, but it doesn't sound good either. In fact, it just sounds weird.)