I agree with you (in principle) and I've thought about this before. It's a challenge of democracy that those with a conflict of interest get just as much say as

I agree with you (in principle) and I've thought about this before. It's a challenge of democracy that those with a conflict of interest get just as much say as those that have to directly bear the long term consequences of something. With the particular example of older people, demographic changes mean that the balance of power is becoming more concentrated amongst the aged. Realistically, I see no fair way to start disenfranchising people. The best we can hope for is to think about what constitutional controls we have to protect people generally from a tyranny of the majority, and consider if there are additional ones needed to account for demographic majorities. Getting anything passed is another story...