I think meaningful work often leads to very interesting discussions because people always imagine stuff like humanitarian aid, etc as meaningful. While certainly true, it’s not limited to jobs like those.
In my experience work can be meaningful for something as simple as being a positive change in someone’s job, customer experience or whatever. I personally spent quite a while in a job where a lot of project have been cancelled midway through or were objectively useless to begin with (busywork). This feeling of spending substantial time in my life to work on something that nobody will ever see or perceive as something positive burned me out terribly. And no amount of work life balance and good pay could make that up.
I now have a different job (Fullstack Developer) at the same company. I work more focused and it is more challenging, my salary hasn’t changed substantially beyond inflation. But customers use our product and are satisfied with it, plus it brings revenue to the company. This job is so much more meaningful in a practical sense than the one before.
And there is quite a lot of jobs like my first one. And if you actually believe in a market working as intended, this begs the question: why?