I agree. It’s painful to give up salary, been there done that, but if the company is bleeding you have to chip in to make sure it survives.
I can’t believe it actually makes sense to these people to drive their employer out of business, in the interest of their own salary.
What salary, if the business goes under?
Sadly it's an old phenomenon. The phrase about cutting off one's nose to spite one's face goes back about 1,000 years; the notion of a Pyrrhic victory, well over 1,000 years before that.