Denmark has introduced what is believed to be the world's first fat tax: (Now this isn't a tax on fat people, it's a surcharge placed on foods that are high in saturated fat. Foods that contain saturated fat include, butter, milk, cheese, pizza, meat, oil and processed foods, which are all subject to the tax if they contain more than 2.3% saturated fat. So, not so much a stealth tax, as a health tax.)