Obviously, we should have a political system that gives higher weight to the votes of people who will participate (suffer?) in the system longer.
Therefore, everyone between 18 and 24 years of age gets 10 votes, between 24-30 9, etc, until people over 78 get zero votes (just like minor children under 18).
This would deal with the problem nicely. And yes, I am kidding.
Population growth would actually do that to a lesser extent (because there are more 25-30-year-olds than 55-60-year-olds) were it not for the fact that young people are less likely to vote.
Therefore, everyone between 18 and 24 years of age gets 10 votes, between 24-30 9, etc, until people over 78 get zero votes (just like minor children under 18).
This would deal with the problem nicely. And yes, I am kidding.