I like what you're saying but there's a little-known, almost taboo reason why so many of the underclass smoke. Nicotine has a therapeutic value for many mental health conditions. It's self-medication. For myself, i have a number of of "learning disabilies" for instance, and i know damned well that nicotine helps sharpen my mind. But I never dared say so, until research started supporting that statement. Of course there's quite a big crossover between people with mental health conditions and poor people.
Where's the relevance, you're wondering? Well, l quite a lot of those people won't be able to drive , never mind how much monrey they have. Again, using self as an example, my combination of dyslexia, dysptaxia/ataxia and seizures would make me quite deadly on the road, and if iI ever applied for a driving licence, I'd surely - and rightly- be refused. And , no, I'm not just one isolated case; the old "like attracts like" rule has seen to it that I've got know one heckova lot of others in a similar boat.
So hey! by all means, give the guy a vape but don't be surprised if he's still stuck at the bus stop next year.
(By the way, if you ever notice how all my posts get loads of edits-,that's mostly because I type about as well as I'd drive chuckle)