The problem isn't the ID laws, the problem is the GOP always tries to sneak these in right before an election. If you want a national ID law, there should be a long transition period to allow everyone to obtain one.
Wouldn't tying this in with the census solve everything?
In the real world, Scott Walker signed photo voter ID into law in May 2011. It's now November 2014. One would have to be quite lazy in order to not have acquired a requisite ID in 3 and a half years.
Not that it mattered in the end. There was no voter ID in Wisconsin in 2014, and the lazy whiners lost anyway.