These people are drained long before they enter the work force. And no matter what job they have they will be drained by it. You probably saw a good chunk of them in school.
Some of the most anxious, unhappy, complaining people I met were the underemployed spouses of the very well off. And this isn't a sexist statement because it was both women and men. And some good percent of them had no kids either. Truly no responsibilities.
The kind of people who I'd bump into at the gym just after sunrise on the way to a long day of work, and they lament to me how their weekly in-home massage got cancelled due to a scheduling conflict, and they just don't know what to do with their day. LOL.
One can be happy or unhappy at any objective income/wealth/stress level. You'd be very surprised.
Maybe have some gratitude that your work has given that to you, rather than assuming that other people who are drained by their work are somehow spiritually inferior.