I’ve always liked the distinction between needing your job to survive and being okay if it disappeared for at least a few months
If you have enough to mean you can take your time to look for a good job if you ever lost your current one without having to change your lifestyle, that’s the minimum bound of “enough” IMO. Anything else involves compromise, so therefore is not “enough” by definition.
I’d say the idealised “enough” is when you can do whatever you decide to do without having to worry if you can afford it.
Both of these depend on the kind of lifestyle people lead and how much more they would do if they didn’t have to think about money. For some people that idealised “enough” is unachievable, because they’ve decided what they want to do is make more money.
People that end up chasing money for the sake of having more money will often do so in spite of any moral compass. And FWIW I don’t think there are a high percentage people out there that make “enough” by either of my definitions and that opens up all the exploitation that forces people into shitty jobs and situations they wouldn’t otherwise do