A person who works at an ordinary job and is raising a family will not be able to save much beyond some limited resources for their children's future, potential emergencies, or retirement funds, even when they're good with their money. The ones who have real flexibility have gotten lucky in one way or another - some more fair or rational than others since money in business can be based on manipulation, cheating, cutting out at the right time, or just dumb luck, and being super rich will mean further investment and growth at a level that just isn't available when losing money is not abstract but a meaningful risk. If losing a few million is just a number, you can bet at significant odds and do pretty well when the stock market is going up. If losing a few thousand might ruin your life and you could need access at any time, you won't want to move it out of a safe savings account that barely accrues interest.

Higher taxes for the billionaires means we can provide some of the things those people might be scared about and give them the breathing room to invest their few thousand - make health care, education, transportation or vacations more accessible and affordable, for example...