In the UK id say at least 1/3rd of people in the system are perfectly sane and happy, just know how to play it to benefit them. Therapists seem to fall for people playing the sytem more so than they do understand and help/treat someone who is either mentally ill or sad and needs help. For example quite a lot sectioned under the mental health act (id guess again at least 1/4 are scumbags who prefer to fake illness to keep out of jail therefore the institutionalization period is shorter and easier for them.