Fairly simple, most people will not vote for various reasons. Give them a monetary reason and they just might make the effort. Give everyone that participates a small tax deduction. I understand that voting is the duty of every citizen and should be done willingly without compensation but obviously times have changed and that is not working. Maybe it could be linked to social security, where everytime you vote you get a credit or some type of bonus added to your benefits, that way not only would it be an investment in the country to have more voters it could also be an investment, even in some small way in voters future.