In your opinion, should a company choose to outsource IT staff or build an in-house team?

Outsource and have an internal team for control and audit so company can concentrate on their core competency

I have seen many companies choosing to build their in-house IT team, as they are looking for the "cheaper option", and forget about training and career development. So they end up with (over time) un-skilled personnel but demanding top notch to the same people.