Conservatives say that, then undermine it by deciding that when government is controlling what we put in our bodies, who we have sex with, if we decide to gamble with our money, whether a woman can have an abortion it's something they want. When government uses the military to be policeman to the world and make everyone's enemies our own it's good. And finally they decide that those things are more important to them then the economic freedom that you refer to. In the end, conservatives don't do much for freedom, do they?
It is important to distinguish between conservatism and liberalism, i.e. WHO makes the choices for society, and what choices are made.
For example, both liberals and conservatives may decide that they do not want a bar or adult bookstore or strip club across the street from or next door to the elementary school or, at times, at any other place in the community. That is a reasonable choice for reasonable people of whatever ideology. So the local community, via referendum, vote, or whatever means, establishes a social contract based on the majority sense of morality or values re a policy that no bars, adult bookstores, or strip clubs be located near schools. That is a conservative concept of a social contract.
The conservative looks to the people to establish that social contract and the people order the government to enforce it. The people can indeed be on personal moral convictions oppose abortion, gambling, prostitution, etc. If the majority want a community free of those things, the people can vote to ban them and remain entirely conservative. Or the community can decide that such is not a detriment to the community and elect to allow them. Either is a conservative position IF it is the PEOPLE who decide and not an authoritarian government. The Founders knew that if the PEOPLE do not have freedom to order the society they want, then we revert to a monarchal/dictatorship/totalitarian form of government. Further a conservative social policy does not prevent a person from choosing to seek elsewhere what is banned in his/her own community.
The liberal will look to the government to establish the rule whether or not a majority of the people support the policy and sometimes to demand that the rule be applied to all everywhere. That is not social contract but deference to an authoritarian government to order society.
It is not how people define themselves but their attitude about liberty and social contract that determines whether they are liberal or conservative in modern America.