Not only did none of the billions in tax increases Democrats threatened high-earners with last year make it into the final version of the bill, their plans to 'tax the 1%' turned out to be nothing more than a big virtue signal.

Also why did the Republicans vote for a private equity tax loophole?

The private equity industry was able to gain an additional win shortly before the final passage of the bill when a handful of Democrats broke with their party to vote on a Republican amendment that created a carveout for private equity-owned companies