Apparently the Immigration Officer's work on the way out has been outsourced... to me for a zero cost !!!

Why don't they also outsource it on the way in ?

The problem is that it's definitely not the airline's fault but between the airline and the passenger the US govt. has definitely outsourced their work.

The number of machines thierry informs are available at UA gates seem clearly insufficient, and probably huge queues are to be expected - eventually others may comment on UA international departure peak-times.