Politicians like Obama who think government is in the business of promoting and subsidizing 'LOVE" as long as it's the right kind of love, the politically correct love like homosexual sex premised love but not sexually void sibling love or multi sex partner premised polygamy? What about the politicians in black robes who proclaim that government has no rational basis to exclude procreatively null homosexual sex premised unions from the same societal recognition, privilege, & benefits of heterosexual sex premised unions?
Social conservatism is all about limiting government from imposing upon society. The Constitution limits government fiscally & socially e.g. the 2nd Ammendment is not a fiscal issue.
In many cases, you are correct, in others, allegedly conservative social policy means the expansion of government (i.e. law enforcement/surveillance) power over citizens. One glaring counterexample, is the War on Drugs, which many (not all, but many) Republicans continue to support in the name of social conservatism and morality. You would think that advocates of limited government and constitutional liberties would see the WoD for the huge waste of resources and frequent violation of personal liberties that it is.
Now, you can argue that as long as the rest of us have to foot the bill for other people's healthcare, it makes sense to outlaw illicit drugs. The same argument could be applied to sugary snacks, cigarettes, and alcohol, the regulation of which most conservatives by the likes of Bloomberg (rightly) oppose. A much more sound and consistent argument should be made for a war against Medicaid and socialized medicine, instead of the current misguided and unwinnable criminalization of illicit drugs.