I guess that depends on what you define as "success" going along with the not using taxes to legislate morality, I also do not believe it is the role of government to protect someone from their own bad choices (i.e sugar or cigarettes), going along with this is one of the reasons I oppose a single payer government run health care system in the US, because if we have a UK style health system then adding in all of these legislative actions to control every aspect of a persons life becomes a valid cost control argument

I dont want the government telling me what I can or can not eat, or setting tax policy on their recommendation. I also grew up with the food pyramid as the "government approved" diet that today most people agree is terrible, and if it did not directly cause it heavily aided in the obesity epidemic we have today (in the US).

Distrust in government is our (the US) founding principle, and I have a HEAVY distrust of all government experts. As one of our presidents famously said "The nine most terrifying words in the English language are "I'm from the Government and I'm here to help"