I think Ryan, in particular, has been advocating for the privatization of Medicare for years.  It's important to remember that, by his own account, his political, economic and social thinking is rooted in the atheistic materialism of Ayn Rand.  At one point, he was trying to cloak his ideas in the mantle of Catholic social teaching.  I don't know whether he's still trying to do that, but I do know that Ayn Rand's philosophy of rational, radical individualism is irreconcilable with Catholic social teaching, which is rooted in the common good.
I think your word of caution is timely and important.