We are obliged to pay taxes to fund government projects. If this fund are properly consumed for public projects alone then quality public service will be provided to the citizens.
This is a good reason why we need to pay taxes, but since government are so corrupt in many countries people are now afraid to pay taxes. I'm not against on this kind of system, I'm willing to pay for it no matter what but I just hope that the tax collection will spend in the right projects. People should pay taxes right its for our own sake and I still believe in the goverment.