Are most high income people in a greater age bracket?

I was watching tv interviews after assailants shot at a luxury vehicle driver on a road of mansions, one of the richest neighbourhoods in the city. All the people interviewed were older women that looked at least 70 years old. I research rich people online and it seems money snowballs because once you break the investment or executive barrier, earning and saving gets easier and easier.

Are most high income people in a greater age bracket?
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