The GOP zeroed out Biden's IRS increases. CBO estimates a fully funded IRS could easily increase the taxes it collected by a net of $200b/year.
There's also new sources of tax. Dayen likes Dean Baker's proposal for taxes on stock returns: add dividends and stock appreciation at the end of the year, then multiply by the tax rate. Baker says this is a loophole-free way to bring the effective corporate tax rate up from 20% to 25%, generating $65b/year:
https://cepr.net/winning-the-tax-game-tax-stock-returns/
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