Steve's barking; what if the IRS let us elect what our taxes paid for!

What if when we paid our taxes we the tax payer could elect to say what we are paying for!
What if we could say I want my one hundred percent of my tax dollars to go to defense, or one hundred percent to go to education, because I don't like war. May be a person would chose that his or her tax dollars would be a mix of social welfare programs and health care. What if you could have twenty percent of your taxes for roads, thirty percent for education and fifty percent for defense.
Would my fellow Americans be more willing to pay their taxes?
Would we have enough money to pay for necessary things like paying congress.A necessary evil if ever there was one.
Perhaps the would be less cheating? May be we the people would have more money in our treasury?
Perhaps we would have to much money for defense and not enough for the general good?
Perhaps my fellow citizens would be so cynical that they would doubt the money they elected to go for one thing is actually going for something else?
This is one of my ideas that I know is actually going nowhere!