...If everyone went ahead to do things personally then there won't be any scope of a systemized channel and possibilities of having endless problems won't be able to be ruled out ...
You make it seem like nothing great can be accomplished without government, but the reality is that most of what humanity has accomplished has been outside of the control of government, and much of the accomplishment has been done in spite of government.
It is not as if things can't be done without government but we know it is not really possible to get people together in one accord without one form organization. The organization that will be respected to carry out functions to that group. I'm saying that this is the role that "government" perform and this why taxes are levied to get the roles performed.
The government was mandated in order to protect the general public and welfare of its citizens. Aside from protection, the government's role include developing infrastructures for the country, implementing rules and regulations, imposing tax for its expenditures and maintaining education as its top of its priority. Tax is a system wherein it is enforced upon the general public as a pecuniary contribution for government needs.
Although some countries have their negative experiences with the government, that issue must be set aside as it is irrelevant from the discussion. Whether we like it or not, we still need to be diligent into paying taxes.