'insane policy' is correct and usable in written English.
You can use it to describe a policy or decision that is so irrational or foolish that it can't be taken seriously. For example, "The government's insane policy to raise taxes during a recession is going to devastate the economy."
"I would characterize them as the victims of this insane policy," Mr. Corbin said.
For Mainers, it was comforting to think that the company made enough money to sustain its rather insane policy.
Your article about the rising costs of diabetes serves to highlight our insane policy against the medical use of marijuana.
A lot has been written about the insane policy of trying to ram democracy down the throats of other nations, but I'd like to add my own views.
I didn't get an avocado; I'm going to Morrisons for them, a two-pack, ripe and ready to go: £1.75 – 87.5p each … Oh no, I'm not – or shopping at Morrisons at all, until they change their insane policy of only selling cosmetically perfect veg, as highlighted in Hugh's War on Waste (BBC1).
For Mainers, it was comforting to think that the company made so much money that it could sustain its rather insane policy — that whatever losses it might take on returns it more than made up for in sales, and that the store represented a kind of retail utopia.
We are fighting Iraqis who have been radicalized by the insane policies of this administration.
Destroying family homes and communities and young people's educational opportunities, undermining renewables while polluting land, air and water with insane policies like fracking, this is all of our future.
He should be able to answer the questions people are asking, especially when it comes to seemingly insane policies like banning something just because it looks like something else.
Judging from the photos, the French president's visit stateside went just as well, although Macron, unable to convince Trump to stray from some of his "insane" policies, may have left a little disappointed.
Insurance Madness Compounding my physical discomfort was the emotional turmoil caused by insane insurance policies.
