Except that isn't true at all. The COVID stimulus checks were a huge boon to the economy and cost about 800 billion dollars, meanwhile just the first round of trump tax cuts are projected to cost the US 1.5trillion. Dollar for dollar, providing spending power to the lower income earners generates more economic stimulus. Talk to someone making less that 200k a year, and there is a laundry list of items they need or want to purchase. Ask a billionaire what they are waiting for the money to buy, and it's nothing. When you have an unlimited check book, why would you wait?

The whole reason why the top 10% spend 50% of the economy, is because they have 99% of the disposable income. The idea that the poorer 90% of us are hoarding money more than the freaking multi-million/billionaires is laughably out of touch.