allow citizens to decide where their taxes go, that means some tax destinations will receive less or maybe no tax money.

This will cause the government to be smaller and the government will be more by the People. Remember this quote from the Declaration of Independance,"We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness. — That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed," People being able to choose to put tax money toward some government causes and not to some will result in the consent of the governed having important influence.