Operation staff will immediately start guarding the food bowl as resources become finite. Server provision waits start to seem like breadlines. Power is consolidated with Those Whom You Must Ask.
This is the worst part about moving out of the cloud, especially since cloud computing has moved a lot of ops and deployment responsibility to developers.
I would say an absolute pre-req for moving from Amazon to own servers would be tooling like VCAC or OpenShift to give people a nice self-service experience.
Then you get "out of capacity" errors even sooner. You could have a pretty bad experience with an internal cloud that was self-service but wasn't run like a service on the business side, so the fixed annual budget was exhausted immediately.
This is the worst part about moving out of the cloud, especially since cloud computing has moved a lot of ops and deployment responsibility to developers.