Social security numbers are assigned at birth and everyone including the homeless have one as long as they were born in the United States or came here legally at some point. People have to have a driving license to drive on roads in the United States irrespective of the state you live in. You can opt to be an organ donor on applying for your drivers license. The case being made here is that the facility exists to automatically register citizens to vote given that the DMV must know your age and who you are to issue you a license. This would address the issue of people moving from one state to the other. According to this article, some states like Oregon have already made it the responsibility of the government to ensure that every citizen is registered to vote.
65% of potential US voters were registered in 2012 according to Census data.
Pew Research ranks the United States as 31st of 34 in turnout at 53.6% of the eligible voting population turning out to vote, also based on the 2012 election. But this 53.6% number is based on the estimated number of total voting eligible citizens (241 million) in the country, not on those citizens actually registered to vote.
So 65% of 241 million were registered which comes out to 156.6 million people and 53.6% of 241 million actually voted which is 129.17 million. Then of those registered to vote, 27.43 million people did not vote.
As a percentage of registered voters, that is 17.5% of registered voters who did not vote.
So if one was to ensure that the other 35% of voters not registered were automatically registered to vote that would equate to 84.35 million additional registered voters. Again if we assume that only 17.5% of those will not vote (it could be higher), that would be an additional 69.6 million people voting in National elections.
As this article posits and the numbers above show, the issue is not one of voter turnout but one of voter registration.
I realize that this topic over laps the issue of the voter id requirement but we absolutely have to simplify the voting registration process so that everyone who has the right to vote can get to vote without their ability to vote being meddled with.
This is supposed to be a democracy where everyone of age who is not a felon gets the option to vote irrespective of the perceived intelligence or lack of intelligence behind the same.