The data show that... tax revenue is directly proportional to GDP. So if we want to increase tax revenue, we need to increase GDP.What happens if we instead raise tax rates? Economists of all persuasions accept that a tax rate hike will reduce GDP, in which case Hauser's Law says it will also lower tax revenue. That's a highly inconvenient truth for redistributive tax policy, and it flies in the face of deeply felt beliefs about social justice.
Presidential candidates, instead of disputing how much more tax to impose on whom, would be better advised to come up with plans for increasing GDP while ridding the tax system of its wearying complexity. That would be a formula for success.