This is a rotten post and I'll dissect it.
> The painful truth
You're immediately claiming truth. That blocks other viewpoints. Also 'painful' which is a weasel word.
> people who actively use drugs
as opposed to passively use them?
> and decimate their bodies
you presuppose what they do 'decimate' their bodies. Maybe they do but it's a bit short on facts innit. And related, does taking copious amounts of alcohol (which I agree does damage bodies) count, what with alcohol being legal and socially acceptable?
> when provided a steady supply of drugs will simply die sooner?
A presumption, although one I'd have real trouble disputing. But facts are needed here.
> It seems hard to argue
dude, more weasel words!
> that supporting someone's heroin habit wouldn't incur a higher than normal cost for healthcare
The article gives examples of higher healthcare (and police) costs for not supporting them. Quite explicitly.
Also
"when provided a steady supply of drugs will simply die sooner" and "incur a higher than normal cost for healthcare" may be incorrect - they may die sooner thus saving the NHS money because pensions and extended healthcare due to old age are avoided. I understand this argument has been made for smoking; smokers are claimed to cost less than non-smokers. I'll see if I can find a proper study for this.