a very good way to re structure your essay would be as per below:
Population control is one of the greatest concerns in this current environment. Some believe that government has responsibility in controlling its population growth by regulating family size through rules. I agree with their belief and I support my view through following explanations
1) Introduction
Nowadays, overpopulation is one of the greatest concerns in a nation. Therefore, it is agreed that necessary precautions such as regulating family size through rules should be implemented by government to control population growth.2)Since you agreed, talk about how important it is to prevent overpopulation and how the government is responsible for this(merge par 2&3 and reduce your sentences)
3)talk about the efficiency of tax among all solutions available to control population growth
4)Conclusion.The morality of controlling population through tax and add in some of your opinion.Do not
introduce another solution or idea.
hope this helps...