It absolutely disproves the statement "McDonald's where minimum wage is $15 don't really charge that much more than the places where it's $7.25"
McDonalds charges >50% more in this comparison of $15 vs. federal minimum wage locales.
I'm not making any claims whatsoever about why the price is higher in NYC. I just want people to stop relying on the canard "McDonalds prices are similar everywhere" during this debate.
a) Customers having higher salaries
b) Property being massively more expensive
c) In the case of NYC, much higher property taxes
d) Yes, perhaps the cost of labor as well
Seems really hard to draw any conclusion given all of that.