I think it means people really like drinking and what society says are valued skills, knowledge, and abilities and what someone is actually compensated for those skills, knowledge, and abilities don't always line up perfectly or the way we would initially think.

For example, someone just repaired my leaky roof. I paid a shit ton: they literally made more in the 2 hours making the repairs than I make for two hours of work with two degrees (bachelor and master) by at least a factor of 25 (I did the math). We both have lots of experience. Their trade being more lucrative than my office job is not so uncommon. But I'd be lying if "I am in the wrong job," didn't pass my lips at least a half dozen times since the work was completed.

I also know I couldn't get up on my roof and do what they did... So I feel OK with what I paid them for the job and I won't be running out to learn how to fix roofs any time soon.