I'll probably drive a used corolla for my whole life just out of unwillingness to make people feel like I'm better than they are.
I have similar troubles flying business class. At least let business class be a separate plane >.>
Indeed, nice cars say to me: "there's a moron who lacks taste/perspective, and probably is really bad at managing their life and money. They probably have large amounts of debt and leverage.".
You can call me judgmental, but its an infinitely better attitude to take than anything approaching admiration/jealousy.
A car with air con is clearly better than one without in many countries for example.
Same with business class - clearly having a bed to sleep in on a 10 hour flight is better than sitting up, how much better depends how much you value your sleep.
Also if I'm flying 12h, I'd really enjoy the business class. The reason I don't pay for it now is because, well, eh, it is expensive and I'm still young. But I can't imagine 10 years down the line flying economic class for work/tourism on a 10 hours flight. It's too much torture to be worth it.