For the product in question, they aren't using more added sugars than fruit.

As you can read on the label:

    Ingredients: Strawberries, High Fructose Corn syrup, Corn syrup, Sugar, Fruit Pectin, Citric Acid.

    Serving Size              20g

    Total Sugars              12g
       Total Added Sugars      9g

Each tablespoon of jam contains 10-11 grams of fruit and 9-10 grams of added sugar. The jam is 60% sugar overall because there is sugar in the fruit too.

And that's weighted by share of the output. If you're measuring the input, this recipe is going to take a lot more "fruit" than "sugar", because part of making jam is boiling away a bunch of the water that occurs in fruit, whereas all of the added sugar is retained. (Corn syrup, however, seems to be about 2/3 water, which will make that comparison look worse.)