All you have to do is look around to see that something has changed in the American diet. Everyone is gaining a lot of weight. It isn't "personal responsibility" if it is systemic. You can't blame everyone who is getting fat if everyone is getting fat at the same time.
Many have suspected that corn syrup has something to do with it, and the timing certainly makes it look that way.
The corn problem is huge: The big ag corps get these huge subsidies to grow corn. So they pump corn products into everything. They use some of the subsidies to bribe legislators to give them more subsidies, further corrupting our government. Animals are fed corn, which makes them sick, which makes them need antibiotics, which eventually makes the antibiotics useless. The Gulf of Mexico has a huge dead zone coming out of the mouth of the Mississippi because all the fertilizer from growing corn runs down the river and pollutes the Gulf. Poor farmers in Mexico can't make a living growing corn because American corn is so heavily subsidized, so they give up and migrate north.
So take a look at this: High Fructose Corn Syrup Proven to Cause Human Obesity.
Stop the corn subsidies. Just stop them. Cut them off. This will lower "government spending" - especially when you add in the amounts spent on the resulting health care needs - and save our health, Mexican incomes, reduce government corruption, reduce pollution in the ocean, help stop animal suffering and even help us have antibiotics that are effective.