Social Conservatives are less than 25% of Republicans and are probably less than 20% of the total.
Then why do they get more than 50% of the vote in the primaries?
Being religious does not equal being a social conservative.
Sure, some people are religious but not socially conservative... but they're usually Democrats.
But Gary Johnson and others are/were pretty damn close to "coming out."
Sure, Gary Johnson was pretty great (I voted for him)... which is why he lost the Republican primary by a landslide. The Republicans are incapable of electing a reasonable candidate like Johnson precisely because they're overrun with authoritarian theocrats!
It's too bad, too, because unlike the rest of the Republican candidates, he was socially-liberal enough to have a chance of beating Obama in the general election (had he run as a Republican instead of a Libertarian).
Go to Red State and Legal Insurrection and you'll see that many are opposed to the leviathan state.
Maybe some people on those sites say that, but they are either A) a vocal minority, B) fail to actually vote, or C) claim to be for small government, until they realize such a position is a detriment to their pet special interest (usually Social Security or one of the talk-radio "rile up the dumbasses" issues, such as any involving religion, race, evolution or climate change) whereupon they vote for the authoritarian candidate anyway.