It's not as if sugar is cheap. There is an OVERWHELMING REASON for them to do so.
There is very little doubt that they add them to make you consume more.
If they didn't produce the desired effect, they wouldn't spend the money to add them.
Yep. Look at all the high fructose corrn syrup that's used in just about everything. If you can stand it, look at the Monsanto/GMO corn/USDA relationship. It will make incest look respectable.