Obesity Tax

First, please listen to the news article: Click here to listen

Questions:
1) According to the article, what are the Mexican government's two reasons for proposing this new tax?
2) What is one reason for Mexico's tax system being presently unsuccessful?
3) Do you think a tax on high-calorie foods is the best way to tackle obesity?

If you couldn't catch everything from listening, then please see the article here.