They are but big businesses like that will cut labor to save some money and use profits from others to keep them afloat.

I know for a fact McDonald's does this. The stores in super unpopulated areas operate at a loss. However, this still let's people get their McDonald's so they stay a lifelong customer. The stores in busy areas make a killing and that subsidizes the rest.

My company does something similar. We make baby formula and some special stuff for the premies and what not. We operate on a loss there BUT the babies we help with that will end up being on our regular formula for the duration, and that's where our profit comes from.