Given that we're 3-5 years from FIRE such a decision will affect us, most distinctly in the first year when our tax obligations are way up, but then will level off. Our window is pretty small at this point. We'll be okay as long as we can contribute to Roths and as long as they don't limit the amount we can contribute to some unreasonably small number.
BUT, as the person who administers my company's 401K plan I think it will be a disaster in getting younger people to start contributing toward their retirement. The "front loaded" tax advantages are one of the few carrots for encouraging young people to start early, and even at that many still don't do it. We still have hold outs who don't contribute enough to get the company match. It's always a challenge getting people to look far into the future and sacrifice today for a long-term, somewhat "fuzzy goal." But when they get zero tax benefits in the present, I think the effect on savings behavior will be stunning.
I guess it's one way to keep people working until they die, forgoing their Social Security payments as long as possible, staying on employer-provided health insurance instead of Medicare, and basically not becoming a "burden."
I called my legislators...