Who should be able to vote?

I know this might sound crazy, and i mean no disrespect to seniors, but do you think only ppl who are of working age should be able to vote, and ppl who are retired should not, my logic is that once u retire the overall economy is no longer ur main concern, and u will be more concerned with the benefits u are receiving, even if it means sacrificing the futur of the country by making decisions that only benefit u, the US spends 4 dollars subsidizing Seniors and only 1 dollar subsidizing kids, i think if kids could vote those numbers would not have the degree of difference they do....all view points are humbly appreciated, and once again, i mean no disrespect to seniors so forgive me if anyone interprets it that way.