The Republican tax scam is bad enough without people like Sen. Chuck Grassley opening their mouths to boot.

The Republicans passed their destructive and hugely unpopular mess of a tax scam bill by the skin of their teeth Friday night, and it appears to be headed to Donald Trump’s desk if they can get it out of conference.

The damage this bill could do to the country is extensive, but so is the political damage the GOP will face for passing it in the face of so much resistance.

Republicans have already made few bones about the fact that this bill was basically a payoff to their wealthy donors, but Iowa Sen. Chuck Grassley took things to another level when he openly displayed the contempt for ordinary Americans that is the beating heart of his party’s politics.

In an interview with the Des Moines Register, Grassley said that people who “invest” are more deserving of tax cuts because they don’t waste their money on frivolities:

“I think not having the estate tax recognizes the people that are investing,” Grassley said, “as opposed to those that are just spending every darn penny they have, whether it’s on booze or women or movies.”

Grassley’s attitude explains a lot about Republicans, but it certainly doesn’t reflect the experience of average Americans, who actually spend their money on things like cancer treatments and child care and putting their kids through college.

Trump and the Republicans may be basking in their victory now, but the people Grassley just trashed as booze-guzzling wastrels will have the last laugh in 11 short months.