Essentially it's keeping up with the joneses. Turns out rich people are, on average, more lucky than they are original or skilled. They're generally subject to the same personality flaws as any person making 40k/year or less, but whereas the person making 40k/year has financial constraints on how much they can indulge their character flaws, the deca-millionaire or greater does not. Money is an accelerant, and if you're already deeply insecure (as most obsessive workaholics that become billionaires are) money will only make you more so.