Pros
They will not fire you even if you don't work as they need some headcount as target. Guarantee of annual 6% hike without doing any work. Your manager will not know that you are reporting to him. Can do full time gossip and phone call( and HR person will join you with earphone & mobile) without worrying technical person beside you. He will not be able to do anything because, there is no manage to listen such problems.
Cons
You will develop habit of getting free lunch. You can be useless in few years. Capable one will have to work like a dog to compensate 4-5 useless team members with equal salary. Performance is not mapped with salary. Frustrating to see capable people cleaning all the mess created by bad management and that is without proper management and HM Support. No one explains or cares about career in bombardier as HR is full time busy on personal calls and as he works for only money.