That's a good option. I remember having a friend that ordered the kid's size meal at certain restaurants because she didn't eat that much.
What I used to do (and I know this isn't an option for everyone) is that I took the leftovers home with me, or for later, no need to waste perfectly good food.
I do that at pizza places when it's an option. Sometimes a small pizza can be 1500 calories, that's too much. Kids will often be less oil and salt too which I prefer for health and taste reasons.
the problem is food cost is more often than not the least expensive cost of a restaurant. especially a fast food restaurant. So giving you a large Fri vs small. is so small for them it's not even noticeable from their cost. their loss comes from two things the sizes and price difference are only their to get you to buy the one with the beter profit margin. small and medium are only there to make you feel like you got value from buying the large. it cost more for the card stock Fri container than it does for the Fries.
Or they don't give a shit and chips are cheap to make.
Just don't eat them all, hungry children in India or whatever your mother told you to get you to eat your green beans aren't starving just because you don't eat everything in front of you.
Bro.
How about giving people the option to pay less for smaller portions? Is that not allowed for some reason? I’m a small guy, and every restaurant I visit in the west pretty much charges me double and gives me twice as much food as I could possibly handle. It sucks when traveling, because I can’t exactly just take it home.