I don't understand how the "tax cuts grow reinvestment" argument sways people. Investments into the business are deductible as expenses, meaning doing the exact opposite of a tax cut will actually drive reinvestment far more effectively. Cutting taxes allows for stakeholders to withdraw profits with much less of an incentive to reinvest.

Want to drive up the velocity of capital? Cut personal taxes especially on lower bands since people in these bands are more likely to spend that money on essentials and personal luxuries to make life better. Increased spending -- be it at the corporate level on growth, hiring, and research, or at the personal level on necessities and occasional luxuries -- keeps the economic engine going.