1. Because taxpayers that were old in the 1940's, the 1950's and the 1960's and who are already dead paid for their education when today's senior citizens were children in the in the 1940's, the 1950's and the 1960's.
2. Because young taxpayers now in the workforce who are not related to them are paying taxes to support all the social service that, as senior citizens, they are taking advantage of right now.
2. Because, 10-15 years from now, when those senior citizens have loooong since ceased contributing any tax dollars to society, young students who are now in high school who are not related to them will be paying taxes to support all the social service that, as senior citizens, they will be taking advantage of.
How about a deal?
Senior citizens can opt out of paying any taxes for any services that benefit the younger generations and the younger generations can then opt out of any taxes that benefit senior citizens right now and in the future.
Since the younger generation will probably find the Social Security system bankrupt when they are old, the deal can start by the younger generations stopping all Social Security and Medicare tax payments and letting senior citizens fend for themselves.