Nutrition labels on food were heavily fought by industry but that was the past when corruption (regulatory capture) was not as bad as it has been in recent decades.
Today, food labels wouldn't be implemented at all. Voluntary industry marketing labels on some products is all one would have. If it was passed in the 90s, we would have something like Energy Star where industry does it without punishment or oversight and the labels would be as inaccurate and unregulated as Energy Star is.
Do keep in mind that VW just was punished in a significant way (mostly because they are foreign) for cheating on recent regulations. So these things are not entirely useless.
I'm sure Energy Star doesn't cost that much; it is mostly an excuse to KILL it. Just like defunding PBS saves less than a pentagon rounding error. Hell, the Star Wars Program is STILL being funded (under less stupid names) and STILL doesn't work and costs about 50billion which is about the same amount Trump is asking to increase military spending.