To me, this isn't sarcasm, just a critique of human nature. It certainly doesn't fit everyone, but it does fit some.
I could make it more uplifting, however. No one is satisfied with what they have in these examples. But that lack of satisfaction is the same thing as a drive to excel and achieve. It's a drive to avoid stagnation. It's a drive against complacence. We all need some sort of enemy, some sort of bar to measure our progress against. We are a goal-based people. Meeting a challenge today is only as good as the next milestone up ahead.
Thee years ago, I earned less than $20k. Two years ago, $30k. This year, $55k. Am I rich now? Am I done? No. I have more plans. Better plans. One day, I'll be without debt, earning $80k, sitting on a net worth of $200k. Will I be rich? No. Will I be happy with that, ready to just call it good enough? No.
That doesn't mean I'm not actually happy. But in a financial sense, I've only met one person who's been "happy". I have a half brother, happy to have a welfare check arrive for him, his wife, and their three children. He's happy with that. But he's not actually happy. I don't want to see the day when my financial drive goes away.