I'm not sure what else they can do. After the last round of deathfood they instituted that bell that goes off every so-many-minutes and all the workers stop what they're doing and wash their hands. I've seen it many, many times, and everyone clearly washes their hands, changes their gloves since the sinks are right there in front of you. Of course how much workers follow this probably varies by location.
There are so many other places that have similar set-ups (Subway, Mod Pizza), and yet they don't run into these issues. Hell, the workers at EVERY SINGLE SUBWAY in my area are absolutely filthy, disgusting, curry-smelling, poop-wiping-bare-handed Indian folk, and yet no one gets sick there.