Conventional economic wisdom says a time of crisis is not the moment to enact tax increases. But, as Eric Toder at the Tax Policy Center recently pointed out: “[Tax experts] can begin to think of the time after the pandemic passes and how government should respond to massive increases in the public debt, and the new tax increases that Congress will need to enact to fund them.”

Initial tax increases should hold harmless working- and middle-class families who will be the most economically vulnerable coming out the pandemic. The first several trillion in new revenue should come from America’s wealthiest households, those who have seen their taxes slashed over past decades.

At the top of the list of new tax increases should be a wealth tax on our billionaire class.

A new Institute for Policy Studies Inequality briefing paper, authored by Bob Lord, reveals that between 1980 and 2018, the taxes paid by America’s billionaires, when measured as a percentage of their wealth, decreased a staggering 79 percent.

The only appropriate metric by which to measure the tax burden on billionaires, the briefing paper explains, is the rate of tax they pay on their wealth. Unlike the rest of us, the living expenses of billionaires do not constrain their accumulation of wealth. Nor do they rely on their work to generate additional wealth. For billionaires, the accumulation of wealth is driven forward almost exclusively by the growth of their existing wealth and constrained almost exclusively by the tax they are required to pay. No matter how the taxes imposed on billionaires are determined – by income, consumption, property ownership, transfers by gift or bequest – they function only as a tax on wealth.