[sosborn]

>The basis is that these people choose, of their own agency, to shoot up with used needles.

They certainly chose to shoot up right until the point they achieved chemical addiction, but after that there is much less free will than people presume.

>By what moral basis should society be paying for the consequences of willful degeneracy?

I don't know about you but I hate seeing people self destruct. I certainly feel an obligation to assist them when possible. You might not, but please don't act like your moral compass is the only one that matter.