Is $50 enough?

Arizona is considering charging Medicaid enrollees $50 who do not follow physician-ordered weight loss and smoking cessation programs. Apparently smokers and obese people generate a big chunk of the state's medical costs.

In Arizona, 25.5% of residents were obese as of 2009, according to figures from the federal Centers for Disease Control and Prevention, ranking it about in the middle among states. About 46% of Arizona's Medicaid enrollees smoke daily, according to a 2006 survey by the state's Medicaid agency.

My only question, do they think a $50 surcharge is big enough to change behavior?