  I find the common envelope (CE) energy formalism, the CE \alpha-prescription,
to be inadequate to predict the final orbital separation of the CE evolution in
massive envelopes. I find that when the orbital separation decreases to ~10
times the final orbital separation predicted by the CE \alpha-prescription, the
companion has not enough mass in its vicinity to carry away its angular
momentum. The core-secondary binary system must get rid of its angular momentum
by interacting with mass further out. The binary system interacts
gravitationally with a rapidly-rotating flat envelope, in a situation that
resembles planet-migration in protoplanetary disks. The envelope convection of
the giant carries energy and angular momentum outward. The basic assumption of
the CE \alpha-prescription, that the binary system's gravitational energy goes
to unbind the envelope, breaks down. Based on that, I claim that merger is a
common outcome of the CE evolution of AGB and red super-giants stars with an
envelope to secondary mass ratio of (M_env/M_2)>~5. I discuss some other
puzzling observations that might be explained by the migration and merger
processes.
