Consider Joseph Sisko’s restaurant, Sisko’s Creole Kitchen. Joseph owns the restaurant, but he doesn’t sell anything. He provides goods and services, but he doesn’t make any money. Sisko’s Creole Kitchen is not a business, it is a labor of love that Joseph operates for himself and his community.
Additionally, the Federation is very socially liberal but it is not economically liberal. Economically, liberalism is a pro-capitalism ideology and capitalism has been abolished in the Federation.