> 3. Closes the backdoor Roth IRA (
https://www.bogleheads.org/wiki/Backdoor_Roth) only for people making over $400k. Closes the mega backdoor (
https://www.bogleheads.org/wiki/Mega-backdoor_Roth) for everybody.
Just a nit-pick of your analysis. The proposed legislation closes both the megabackdoor Roth (employee after-tax contributions) and backdoor Roth (prohibition on IRA contributions from being converted) regardless of income level:
"Furthermore, this section prohibits all employee after-tax contributions in qualified plans and prohibits after-tax IRA contributions from being converted to Roth regardless of income level"
...which, depending on what you consider a tax increase, appears to run contrary to President Biden's promise to not increase taxes for anyone making less than $400K. This gutting of IRA conversions seems like the only piece of the pie that hurts the middle class, although arguably the upper end of the middle class who have the means to set aside more than the $19K 401(k) max per year.