Why not pay if we are required to do so? right? We should pay taxes not because we have to or we need to but because we want to help street children, and a children that cannot afford to go to school or old people that has a high maintenance of medicine. In that way, we are helping the government as well as our neighbor.
When speaking globally, most of governments are not actually diverting the money from taxes to those noble areas of humanities. Finally, the tax is coercive and thus shall be legally protested by all means. Governments shall be re-programmed so not to ask for taxes.
Imagine giving money to government officials who never do their job. You are supporting the corrupt government.