Although human behavior is complicated, and many bad habits have deeper psychological roots, those habits that affect our health negatively and nonetheless appear on a large scale should be analyzed from a structural perspective. They are symptoms of an underlying problem, which is rooted in public healthcare provision. Public healthcare liberates people not from insecurity in terms of health services, but from responsibility for themselves.
If our intention is to decrease junk food consumption, the only sustainable policy is one that addresses the full liberalization of healthcare. This would resolve the problem of a chronically underfinanced public healthcare system and make us aware of the fact that our health is a valuable good.