A recent Washington Post story about escalators in the Moscow subway system reported that there are 643 escalators that a serviced by a staff of 3,000 mechanics. They leap into action anytime there's a breakdown.
It took the CTA several months to repair and rehab nine escalators in the Red and Blue Line subways. That just wouldn't cut it in Moscow.
In Moscow, there's even a crew of escalator "watchers" who sit in glass booths to keep things moving.
I know we could use way more escalators on the CTA in Chicago. Check out this video of a long Moscow escalator. (Hat tip to Steven.)