Not paying the tax is theft according to me. Whatever government is collecting on the name of tax is being utilized for us - Roads, parks, corporations etc. Taxation is for the betterment of society, so lets all pay it fairly without escaping from it.
Is the government accountable for the way the taxes are spent, i think not, Most of the taxes are given to other countries as aid, whiles we have our own citizens in need of aid as well, we should prioritize on how we spend the taxes of the people if it doesn't benefit them in the long run.