Why does the U.S government subsidize fast food companies?

The executives of these companies make large profits due to pocketing taxpayer’s money combined with paying their workers lower wages with little or no benefits. Moreover, many fast food workers have to use public assistance to get by, and the food isn’t even healthy.

Here’s a chart showing the fast food companies, their profits and their subsidies. You have to download the full page at the end of the short article to view this.

I know my question is a bit ‘slanted’, but I thought it was important to point the above issues out first. My question is whether there’s any justifiable reason/s for the American government to subsidize fast food corporations, and if there are any, what are they?