Are you suggesting that you have gained no benefit from the children in this country being educated? One can readily contest the effectiveness of our school system for the funds spent, but it is short sighted to say the childless have received no benefit. Is the level of benefit sufficient to justify the cost? I suspect it isn't, at least not for conservatives, but there is no reasonable way to measure it.
Probably have. However, if people are going to be so bizarre as to suggest that a failure to procreate is a societal negative -- and to imply that I am to be taxed for my 'sin' -- then I am more than willing to point out that I get no DIRECT and IMMEDIATE benefit from paying school taxes.
It is an argument intended on dulling the rhetoric from the "Have Kids or Die" crowd that this line of thought is likely to create.