Is it voluntary TODAY or not?
Social security is not voluntary.
This new program will not be voluntary in about 6 months to a year. There is no such thing as a voluntary government program. They all end up being mandatory.
This is how we've been losing our freedoms. Letting the government institute these "voluntary" or limited programs which get extended and become more and more permanent.
ANYTHING the government does beyond defense and very little else is unconstitutional and must be opposed.