Which hits on another assumption of theirs that infuriates me: this idea that people and businesses who "hoard" their money are somehow denying the greater economy the stimulating influence of that hoarded money. Where do they think this money is? Stuffed in a mattress somewhere? Sure, you can "hoard" money in an investment or even a bank account, but the idea that it's economically neutral is ridiculous. Investments drive economic activity somewhere else, your deposits at the bank allow them to loan money to someone expanding their business, etc, etc. This is why I get beyond irritated when the Republicans go to lengths to maintain this illusion of comity and peerage with the Dumbocrats. These people are economic morons, why should we pretend their ideas are at all valid and useful to the conversation?
Again though, it's not about actual results. If it were about revenue, they would slash taxes because it's been proven time and again that when taxes go down, the government ends up getting more revenue in absolute terms. The"hoarding" argument is no different -- it's not about the actual economic consequence, it's about setting the narrative, the pretext, for confiscation of "hoarded" wealth.