Spending a couple thousand on LASIK was the best investment I’ve ever made. The money I’ve saved on prescription glasses alone has already paid for lot of it, and ten years later my distance vision is still nearly perfect. Now only if there was a similar procedure for my neck and posture..
Freezing to death is so unspeakably painful so that you will do anything to avoid that, in the olden days homeless people would sleep in hidden maintenance spaces or near heat exhaust vents in the most extreme cases. Dying of cold is so rare that it does not even warrant it's own category in causes of death statistics here but you could argue some of the drug/alcohol deaths might cover that.
You are going to have to abide by those "bummer" consumer protection laws if you are going to sell goods or services to the common market which coincidentally will become harder if the UK really decides to go forth with this lunacy.
Even with free healthcare that seems like a foolish place to save money when very widely used alternatives exist in the regulated market.