If my company dies tomorrow I can easily find new work or try to start a company for a year and then look for a job if that fails. I basically think of the company as a client who I get stuff done in exchange for money and I think that's far more healthy than the alternatives.
PS: I live well below my market rate and toss the extra into savings. Living pay check to paycheck when your location or skills make it hard to find a new job is simply poor planing.
Yes of course you and your family come first. But you still have to care about the health of the place that gives you money.