Amtrak’s plan to create a new “economy” class on it trains is nothing more than a move to boost its bottom line by inconveniencing riders, US Sen. Chuck Schumer (D-NY) said Sunday.

The railroad announced last week it was considering the new designation by offering smaller seats and shaving off legroom so it could cram more riders into cars.

Schumer warned that the plan would have trains feeling more like cramped airplane cabins, arguing Amtrak must “scrap the shrinking seats idea” and the federal government must invest more in the railroad.

The Democrat’s comments come as Gov. Cuomo ordered the MTA to withhold $50 million in rent to Amtrak because of the company’s poor stewardship of Penn Station, which has been plagued by infrastructure-related delays.

Amtrak owns the rails running through the station and is in the midst of a massive track-repair blitz that will result in a 20 percent reduction in service through Sept. 1 and could cost the company up to $40 million.