Social Welfare is neither historically nor currently a liberal value.

Generally the idea seems to be social liberalism, e.g. people should laregely do what they want, and since a few decades bastardized with neoliberal economics, which are the opposite of freedom. E.g. ideas like reinstating slavery, selling children, murdering people with impunity all based on an arbitrary freedom of contracts.

American liberals are far right conservative/reactionaries sprinkled with some gay rights by most countries standards.