You’re not wrong… But the crossover age range of the vast majority of billionaires and seniors is a damned circle, it’s both a class and age thing simultaneously. Boomers are usually defined as those born between 1946 and 1964, so that age range would be 62-80 as of 2026.

Nearly half of the 3,323 billionaires worldwide in 2023 were between 50 and 70 years old. Moreover, more than 40 percent were above 70 years, whereas around 10 percent were below 50 years.
https://www.statista.com/statistics/621046/age-distribution-of-billionaires-globally/

And that ignores the much larger number of them that are under a billion but still well on their way up towards it. In practicality, there’s little difference between 100 million and a billion despite it being 90% less.