I think I see the point you're making, but the stuff that you say that the stimulus money was spent on are the things that result from the US economic inequality: folks tend to save when they _need_ a safety net; folks tend to pay down debts _when they have debts_ (especially those that they didn't feel they could pay down without the stimulus, which are generally larger, such as medical or legal debts); etc.
I own a box of band-aids, way more than enough to patch the cuts and scrapes I'm likely to experience in the near future. If Biden gave me a band-aid, I'd be very likely to hand it to someone else if they needed it, because I know I have my box. On the other hand, if I have no band-aids, and Biden was so generous, I'd probably either save it for my next (inevitable) cut or stick it straight onto one of my open wounds.