Well laid off/fired is a whole other bag of worms. Everyone gets disgruntled about that.
When I left my first job I was a little miffed at the company, though not about my bosses or how well they are doing financially. The company was cheap, and didn't want to pay me for what I felt I was worth. It was a hard lesson to learn as I did truly love and enjoy working for that company, and thought at the time they really wanted to keep me there, but that's life. Business is business. I wanted more money for myself, and the General Manager wanted to keep expenses down to improve his bonus and look good to the corporate owners. So I quit, and found more money elsewhere.
I understand my job (as a technician) is not one where I am going to pull in $120k a year. In my area I believe the best I can do from a wage perspective, is probably where I am now, around $60k. My current boss probably makes triple what I make (if not more), and I am perfectly OK with that. I don't want to deal with what he deals with. Granted as I mentioned early he doesn't flaunt his earnings, and he treats us all pretty good. This is also a largish corporation, not a little family run business. The CEO is making like five times my salary, plus bonus. What ever.
To me, it seems so strange to look at people in higher positions (Managers, Executives, Owners, etc) and be disgruntled about their personal financial situation. For all you know, they could be maintaining a massive debt to simply look rich. Or they could be rich. If it's that big of a deal for you (not you you, general you), then leave. Move up, become a manager, become an owner. Switch fields.
I found some technicians have this weird idea of what they believe they should be making, without taking on any extra responsibility. In fact some of my former coworkers even thought they should be doing less work, but still get paid much more than they currently make, while also being very stubborn about adapting to technological changes. Now I'm not saying Technicians and other such front line type staff should be paid pennies and live poor, but it's not the type of job where you're necessarily going to be living large, and owning vipers and such.