I can't say how many times I have been given others work to complete. Sometimes I do it, sometimes not. It doesn't seem to matter. Example, A guy has a project to work and isn't doing it then goes on a week vacation and day 1 I am told by skip level boss we can not wait any longer you must do this. 1st of all, managers still are not allowed to say anything remotely close to lack of resources. 2nd, managers play hot potato all day long - big issue comes up, toss out a name, wipe hands. Someone not doing work, find the guy that does work and through him in the ring.
Post ID @3sxr+17FX3mIV
This sounds familiar to me. Some people know how to get out of work and those who don't do all the work for them.
Bottom line - lack of people.