There's two opposing feelings about this. One is that they aren't really happier and are pretty miserable being slaves to their wealth. But that feels like cope. A way to make ourselves feel better about not being in that position. The other is that they are much happier and whatever misery they experience is only relative to the peak elation they feel, which is miles above our peaks. Their range of coping mechanisms for sadness are so far greater than yours it's not even funny. Practically any thought they have can mobilize dozens, hundreds, thousands to make it happen.

Imagine being free of your material conditions and the happiness that would bring. They are free from material conditions. There is no food they can't have. There is no cleaner water for them to drink. They have several estates, not homes, worth more than some entire economies. They have people to defend them from harm. They do not feel cold, or hot unless they want to. There's nothing tethering them down. Now you can say that's exactly the point, they're bored. But there's so much you can do that you only become bored after decades of the lifestyle. And even then you can cope with your boredom by shaping policy and continuously gaining wealth like a game. The boredom you feel, staring at a black rectangle on a beige wall for decades because TV is one of the few distractions in your life isn't the same as them getting bored because they've been to all the million-dollar resorts in the western hemisphere.