In that movie as well, Rosamund’s character got old people institutionalised by making bogus reports from a doctor and sold off their property. I didn’t really like the movie but I thought it was kind of unrealistic that the government could really do such a thing (as her character explains the state can step in and essentially put a person in rehab/old age care center if they are given evidence that the person is “unstable”. Rosamund’s character played the system by manipulating the courts). I thought that part was unrealistic but I guess I was wrong.
I'm going to put "treatment" in huge quotes. Do these people need treatment or do they need society to stop bothering them and accept them the way they are?