Two buns, two or three burger patties, two kinds of chicken, fish and the mcrib (and its bun, seasonally). Tortillas for wraps.
All of which comes pre-prepared. They also have a breakfast menu.
Still not seeing any real difference in labor at the franchise. McDonalds needs more storage space, inventory management. But In n Out cuts their own fries and soaks up the grease with towels, much more labor intensive, and I'm pretty sure they make their own patties in house. So that difference is pretty much a labor wash.
And McDonalds paid crappy wages BEFORE their menu was bigger than In n Outs. So any additional labor from their expanded menu hasn't been compensated anyway. "More" work, same minimum wage.
In the end, McDonalds has more combinations of the same handfull of ingredients, most pre-prepared at some factory. On-site prep labor isn't much different. They both slice tomatoes, prep lettuce(?), etc.
Can you point at things McDonalds does in prep at the franchise that In n Out doesn't? Something that eats 25% of what could be wages? I can't.