Why is it people who always had money stay rich but people with new money waste it all (lotto winners)?

I read over 98% of draw winners spend it all in 5 years. I think it might be because newly rich people use money to buy friends. My friends who wore born rich ate crazy diets, did crazy exercises, worked part time jobs while studying, and stayed up to 4 in the morning planning social activities for charities, they had every intention of earning their lifestyle.

Why is it people who always had money stay rich but people with new money waste it all (lotto winners)?
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