I know will refer to the constitution and human rights on this matter but If a citizen does not contribute to society, how can that citizen have an opinion on it? Ultimately if you do not pay tax, you have no need to affect the political process, and your impact will be negative to others because you will be uninformed on how to vote to improve things.
WHAT DO YOU THINK?
What if you're disabled and can't work? What if you dedicate your entire life to working for charities and getting no pay at all? What if you live in a country that doesn't have taxes? Those people shouldn't have a vote in who leads them? What about someone who earns money but is a complete moron? What about someone who earns money but would vote for Hitler or someone like him if he could? Should it be that the only things that qualifies someone to vote is age and in your case paying taxes?