It the government was serious about trying to tackle alcohol and drug problems, then they would invest money in chronically underfunded mental health services and drug/alcohol rehabilitation schemes.
But I think this more a policy aimed at the Tory party faithful (or at least those potentially losing their faith). IDS and friends will make a big song and dance about it, the pilot scheme will be expensive/have technical problems/etc., organisations working with those with such problems or those living in poverty will kick up a fuss and the idea will be quietly shelved.