Suicide prevention is a very popular fad across the political spectrum, and means restriction is the most popular method of suicide prevention.
What is often missed by those on the left is that this suicide prevention at all costs ethos, and in particular the labelling of suicidal individuals as “mentally ill” allows capitalist society to determine what standards it is rational or permissible to have in order for life to be worth living. This is largely the case because, in order to be diagnosed with a mental illness, all that psychiatrists have to do is to assess that your psychological distress meets a certain threshold that is determined (by fiat, rather than based on any objective evidence) to be pathological. They don't have to identify an organic cause for your distress; simply labelling the distress itself with a more concise term such as “depression” or “bipolar” suffices to medicalise your suffering. Because mental illness is highly stigmatised, the psychiatrists and society in general pulls a nifty little sleight of hand trick in order to leap to the unwarranted conclusion that because you are suffering (i.e. “mentally ill”) you're incapable of sound judgement, and your perception of reality is inauthentic (so if you think that there's something dystopian about capitalist society, that's your mental illness speaking and causing you to have a distorted perception of reality, rather than any legitimate philosophical insight).
You may be suicidal because, like me, you are condemned to a life of low wage, disspiriting work with no prospect of approval. But if you are unhappy because of that, then you're mentally ill. If you would rather die than submit yourself to another 50 years of that; then you're positively deluded and the government is justified in doing anything within its power to prevent you from acting on the basis of that judgement. You'll still probably be considered functional enough as a human being in order to continue working full time at your miserable job, and thus there will be no generous disability package for you in order to alleviate that burden from your life, or protect your fragile psyche from having to be subjected to the rigours of working life. But not functional enough in order to be able to do the one thing that would ensure that you won't have to continue to pay for your existence and contribute to society's tax revenue. You'll be forced to continue existing, which will entail that you will continue to have needs and desires which can only be effectively satisfied by engaging with the capitalist economy.
This is something that ought to be talked about more within the antiwork movement, because psychiatry is one of the most potent forces for capitalist oppression that exists. It legitimises the idea that if you have a different concept of what life should be like, that it's something wrong in your brain (even though they can't prove that your brain is dysfunctional), rather than that there is something broken in society which ought to be fixed.