Politically, no, that is not simple.

Politically, it's the simplest solution of all. The average American pays FICA on 100% of their income. The people who don't are upper middle class to rich, and nobody is going to weep for the 1 less vacation those people take every year.

Careful there; this is typically when the sob stories start about how one is NOT "upper middle class" when making $150K (more than double the median household income), because they live in expensive areas, etc. One saw a similar outcry when the TCJA removed the ability to deduct SALT taxes for effective income levels around that amount.

The reality is, and has always been, that this group (call it whatever you want) of incomes in the $150K to $400K range is absolutely necessary to include in increased taxation policies to pay for all the spending.