A recent study showed that when the rich benefit from individual tax cuts, they don’t stimulate the economy by spending it, they put it in savings. When they are not benefitting from individual tax cuts, then they spend more money instead of saving it. Although I personally doubt they spend much more - having worked in an affluent community for 24 years previously I can tell you that the rich didn’t get rich giving their money away - unless it results in a huge tax writeoff!
PS I deduce that Lewreader may be a doctor himself. Certainly he’s rich, and probably retired. Plenty of time to write five or six paragraph diatribes on a COMICS page!