A single vote by 350,000,000 people with 250 bytes of data per vote would use over 87.5GB on the blockchain. That's just in a really simple case but usually a ballot has like 50 things on it.
and usually 60-70% don't vote. If voting could change things, it would be illegal.
The Australians make it illegal not to vote. You get fined if you dont show.
They also vote on the weekend and employers are fined if they dont allow employees a break to go vote.
Needless to say voter turnout is always above 90%.
*Yes I know you libertarians detest state coercision in any form, including being made to vote, speed limits and fire codes. Tough shit.
Actually, we would like the roads to be private and the owner free to set whatever speed limit he wants, cause, you know, it's his property to do with as he pleases.