Well how about the article in question? It doesn't say a month but the gist of the article is that profit is motivating at least one chain to make patients stay

Well how about the article in question? It doesn't say a month but the gist of the article is that profit is motivating at least one chain to make patients stay too long. Which is the essence of the point you are responding to. My wife is an inpatient psychiatrist. She gets a monthly productivity report. Her pay is based on the productivity. In her system she gets more money on the day of admission than for subsequent days. This gives her an economic incentive to get patients out the door. She hasn't yet succumbed to the pressure to release them early but it's foolhardy to think that economic forces don't or can't play a role. There are lots of examples of doctors doing very bad things for profit.