Perhaps the BEST B1G Forum anywhere, here at College Football Fan Site, CFB51!!!

Sure, there is a lot of demand for fast food.  I'm always still surprised how many McDs I see in Europe and Asia.  

When my kids were smaller, I tried to avoid FF to the extent possible, but we'd fairly often be in a rush.  That Arny's Five for Five deal was a savior.  My son would scarf down 2 before we got home a mile away.

We'll often have breakfast at McDs when on the road.  

If I could educate more people on one thing, it might be credit card use.  

Supply & demand does explain a lot, simply.  But it's more than that. 

Swaths of people, especially poor people, can be cajoled into demand for things that aren't good for them, are addictive, are extremely convenient, etc. 
That's why we can't simply look at the ebb and flow and just shrug, as if nothing can be done.  That's BS and I give everyone here enough credit to know it.
Maybe their plight hasn't been fully considered by some of you.  And that's fine.  But shrugging and saying 'supply and demand' as if that solves anything is silly.

It's herding cattle into the pen they want, then you telling the cattle to think more strategically.  Not mean to be insulting, but you get the idea.