Certainly privatization of social security and school choice are small l libertarian ideas well before the republicans and/or conservatives embraced them.
I know many libertarians don't like to associate themselves with the Libertarian Party platform. But that's like saying, we can talk about philosophy, but lets not put it in the context of politics. Why? Reality must come into play, when we talk politics. I happen to relate political philosophy with party politics. Without party politics and without winning elections, you're political agenda, has no chance of ever being realized.
Is anyone under the illusion, why Libertarians/libertarians never get elected to public office?