I know much more people on the IT Consulting side who are in it for the long haul to partner or whatever. The job was also much better than the Audit scene, 80+ hour days in a sweaty conference room and next to no days off.
They both had he same MO, send in the 30s\40s flashy employees who then delegate all the work to 23 year olds. Once the project is in full force they tend to leave and another crew comes in who interfaces with the low cost offshore teams or 23 year olds.
Shure a lot of the leg work is being delegated off to juniors but that is not of substance here.
What you talk about might be happening in smaller shops but not on tier 1 audits inside the big four, there just is too much at stake.
I was a Deloitte manager.