The article has a clear focus on heroin and meth (drug usage that can be associated with the sharing of needles) and not so much worried about Marijuana.
Also, for those who may not know, just because you legalize a drug doesn't mean druggies will be in the workforce. Just because a drug is legal doesn't mean a company has to hire someone that does the drug. For example, I had my medical marijuana card in California, however, companies still denied me jobs when the pee came back dirty.
No, we shouldn't copy Portugal's drug policies.