After seeing the first answer, I realized that the question was poorly formed and edited this from socialist organizations existing to mainstream center left organizations becoming popular
In a free and democratic country, the plan is to create some type of not-for-profit legal entity (let's call it a corporation), owned collectively by its members. Volunteers who join sign a legal contract that they have to give up certain parts of their property, income, and/or labor in exchange for membership and access to the services provided by the corporation.
Under the umbrella if the main corporation, subsidiaries can be created that provide services to the members, such as
- Internal governance
- Health care
- Child care
- Payment assistance for any of the above
- etc, the only limits are the will of the members, the budget, and the law
This seems like the solution that makes both the political left and right happy since they all get what they want. Why isn't it this becoming mainstream?