Those childless couples, regardless of their sexual predilections or ability or decision to reproduce, are paying for the basic intelligence of the people they interact with on a daily basis with those taxes.
Do you want a cashier that can count your change? How about a taxi driver (omit obvious joke about international drivers please) that can read street signs? What about neighbors that have been exposed to the cultural implications of lawlessness and violence through studying history? Maybe even the expediency of using actual spoken English to conduct business in your workplace, instead of various dialects and pidgins based around different localities in the US?
You can thank our education system for that. If you don't want to participate in civilization I suggest you move somewhere without taxes. You pay your taxes and in return you receive civilization. Thinking that the education of the citizens of the US is merely the responsibility of the people who have them is so incredibly moronic and short sighted I can't even believe you would utter that nonsense in public, even on a relatively anonymous board like this.