Oh yeah, and some people do. Turnover is very high, so anyone smarter than a board that applies themself to the job will be promoted quickly. Granted, a shift manager will still only pull in about $20k per year, and even general managers can only hope for about $45k. Oh and all that's if you work ~40 hours per week and almost every restaurant limits employee hours, ~25 hours per week for the grunts, ~35 to ~45 hours for the people they rely on, but the tightasses will clamp down if you go over 40 hours very often at all. Also you get no vacation time, and the store is (typically) open 364.5 days per year. Last, if minimum wage ever raises, you won't get a raise unless the new minimum is higher than your old pay rate, in which case you'll earn the new minimum same as any slack-jawed retard.
TLDR
The best position you can quickly (over a year or two at the most) move up to is Shift Manager, and here's their pay.
http://www.glassdoor.com/Hourly-Pay/McDonald-s-Shift-Manager-Hourly-Pay-E432_D_KO11,24.htm
A person could, in theory, make GM eventually, but that would probably take five years at a minimum and even that pays poorly, considering how many hours and how much stress is involved.
http://www.glassdoor.com/Salary/McDonald-s-General-Manager-Salaries-E432_D_KO11,26.htm