In political party terms, a liberal is someone who supports the economic system of capitalism but wants to give concessions to the general population (free healthcare, cheap public transportation, etc) to placate the people from changing the system. The idea is if people are making a somewhat decent living then they will be less disgusted with the ludicrous amount of money the actual wealthy make and won’t revolt. Messaging from conservative parties has purposely conflated liberals with leftist (socialism/communism) ideology in order to tie it to the Red Scare and convince lower income people that the idea is meant to take more from working class people.
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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.