There’s nowhere in the world where the cost of living requires $10M/year. To spend that much money you are forced to spend it on high-end luxuries. Of course there are people who could easily consume that amount of money, but most people on that income would put it into investment instead of consumption.
It's a different question how many people actually spend 10M/year - I have no data about that, but I can easily see myself spending that much if my income has been 40M/year for several years. To me personally spending that money would not necessarily mean buying some high-end luxuries. It would probably involve trying to make some changes in the world and influence things. But yes, luxuries and interesting experiences too. If you're interested in this question, try finding more information about lives of famous rich people.
If you make 25k/year getting 1M is almost as good as getting 42M, because you are not used to thinking about anything you can do with 42M that you can't do with 1M. However, if your salary has been 10M/year, you most likely can easily see many ways to spend 42M, which are not something you think about often when you make 250k/year.
Does this make sense?