Actually, Grassley, It's The People Who 'Spend Every Penny They Have' That Stimulate Economic Growth
It's called the Local Multiplier Effect. Somebody who controls the nations tax policy should learn a little about the economy, at least beyond the bullshit you hear coming out of Stuart Varney's spotted dick scented pie-hole.
https://en.wikipedia.org/wiki/Local_multiplier_effect
If you asshats are going to insist on including 'dynamic scoring' (aka 'magic trickle-down faerie dust') in your budget estimates, the REAL economists might insist on talking about the Local Multiplier Effect.
People who 'spend every penny they have' stimulate economic growth in the local economy. It's the people who inherit a billion dollars from their father, and then either stash in in shell companies in the Cayman Islands, or invest in Chinese companies that are dedicated to driving their American counterparts out of business that you have to worry about it.
I'll take a joe lunchbucket, who spends all his money on LOCAL movies, booze and women over an Ivanka Trump who invests all her money in south asian sweatshops that employ children to make overpriced shoes for a dollar a day ANYTIME. Fuck you, Grassley. I always knew you were an elitist piece of shit, who's fighting to turn the United States into a hereditary oligarchy. Thank you for finally admitting it in public.