Even the richest people in the world maintain some financially cautious habits.
For example, Warren Buffett (who, by our math, is worth more than all of the NFL's teams combined) famously still lives in the same Omaha house he bought for $31,500 in 1958. Many of the world's wealthiest don't indulge in extravagance, even with billions at their disposal (and when they do, it's not always a happy ending.)
While this ranges in degrees of neuroticism from simply wanting to give most of the fortune to charity to an Indian tech mogul monitoring employees to track toilet paper usage and make sure they shut off the office lights, wealth is not accumulated by throwing money away.