Proposal
Federal voting limited to a verified Electorate
Federal voting rights would belong only to verified Electorate members. Registration would require SAVE America Act-style documentary proof of citizenship. Voting would be mandatory for that roll, with a $2,000 civil fine for unexcused non-participation.
Two separate questions
Citizenship is already required for federal voting. Documentary proof is an additional verification layer. The U.S. evidence base is thicker on photo-ID turnout effects than on registration-time proof-of-citizenship. Nationwide administrative panels find average turnout effects of strict ID near zero; selected-state studies report subgroup burdens. Those findings do not automatically transfer to a smaller, duty-bearing roll.
Compulsory voting
The United States has no general compulsory-voting regime. Australia and Belgium are civil-penalty comparators, not domestic experiments. The $2,000 fine is therefore a design parameter awaiting U.S.-specific legal and behavioral analysis.
Disengagement as the other half of the design
A large minority of adult citizens already do not vote, including a substantial chronic nonparticipant group across recent national elections. The Regular Citizen track is the formalization of that withdrawal. Whether people would sign a legal waiver of federal voting rights in exchange for the buyout is unsurveyed.