I only have one way to reply to this and that's by calling bullshit. Drugs are everyone's favorite scapegoat but guess what? I've had my share of experience with things you may never expect, including at least one of the things you mentioned, but drugs do not lead to unemployment nor do they lead to theft, on the other hand, people with very little to begin with, and with damn good reasons to be depressed often turn to drugs, and without good drug education (only stupid DARE propaganda), people don't realize the risks they're taking and are unaware of how things are actually impacting their lives (unless they are lucky enough to be able to educate themselves on the topic, which is still fairly rare)
If you disagree, see the Rat Park experiment, the Addiction theory of drug [ab]use is, for the most part, bullshit. (I don't dispute the existance of withdrawal syndromes but that's another issue).
I've done heroin before, I've done meth before, (only 1-2 times each, didn't end up liking them all that much compared to other things), and I'm no slave to any substance, by choice and force of will, and by the effort I've undertaken to educate myself on what the full effects of each substance are, both neurochemically and individually. Were it not for prohibition and prohibitionist propaganda, drug problems would be mostly a thing of the past, IMHO.