> I know the answer is money but I would assume that, at a certain point, you have more than enough money to do literally anything you want in the little bit of time you leave yourself to not be working.
Technically, you're correct. But I believe that a different phenomenon is at play here. That is psychologically, the more money you have, the less likely you're to be satisfied with what you already have, regardless of what use you have for it. (Meaning, the richer you are, the greedier you become.)
This may be not be entirely correct at the lower end - there may be an inflection point below which you're too poor to be satisfied with what you have. But the craving is almost always increasing at large wealth levels.
Addiction to the job. Look up workaholism.
I imagine it’s common amongst high achiever, type A personalities that may end up in executive roles.
I would understand if she was running a huge charity; she would feel that interrupting family time is a sacrifice she makes to improve the world. But, Walmart is just a mechanism to extract value from customers.