Most people who go for more degrees believe they can get better job at the end of the day. People that only go for more degrees in a stare with high unemployment rate are they doing right thing by putting all their focus on academic because this is the only thing they can do best.
If you are looking at financial wealth or probably wants to get so rich, i would say degrees doesn’t offer that, if you look at the list of the world most wealthiest people you wouldn’t find any professors there but rather entrepreneurs because this are things that actually bring direct profits. Even if you are educated and you are employed under someone and never have your own personally built source of income or have a share in someone’s business then you can’t get that super rich. Although they are jobs that pay you to be decently balanced and most people are comfortable about it, this isn’t also bad either because that’s your passion.
The People in countries where jobs are scarce and they go for more degrees are trying everything possible to up their chances in getting those few jobs available. Example is when an opening of job of graduates are open and not multiple positions are available then the recruitment team narrow their search by giving edge to those with added certifications like post graduates studies. This is part of the reason why most people go further in education. Another reason again is some go for specialized courses like in Tech probably because the courses they studied seems to have lots of unemployed graduates and specializing in an area gives you edge when that area is soothed after.
So it is not bad to get more degrees if you plan to practice your profession but when it is totally about been wealthy then only business provide you that and not multiple degrees