The thing is that people who don't vote probably shouldn't vote
In a democracy, you don't get to decide who should or should not vote.
That's not what im saying, what im saying is that people who can but choose not to register to vote are almost always the most uninformed in society and we should not feel the need to encourage them to alter our government if they already have made it clear that they don't care
But that line of thinking is fundamentally undemocratic. If you think uninformed people shouldn't vote, why not reinstate literacy tests? If you accept the principle of universal suffrage, you cannot view the fact that certain people don't vote as a positive thing.
We don't live with universal suffrage, felons and the underaged can't vote as well as non-citizens, and mandated voting could lead to our elections and campaigns getting even more dumbed-down by voters who can be swayed by the dumbest phrases such as "death panels" and "war on women" and electing leaders who go out of their way to appeal to the lowest denominator