Yes, the government is as addicted to cigarettes as anyone else. The bloody things are taxed so much in relation to their cost it is silly. The vaping people understand this and their product is by far a cheaper alternative. So, it is in the best interests of government to keep vaping and cigarettes in the same boat and tax them both to death.
Look, if it is bad, outlaw it. Oh, wait we would lose revenue from it (see prohibition in the USA) and couldn't control it, which would be bad. We (at least here in the USA) regularly ban substances that cause cancer if ingested in such small doses that it might take 10 lifetimes to consume the lethal dose (see sodium cyclamate) but tobacco makes so much money that they can't ban it.