Why outsource
If you're a small(er) body (public or private sector) I can see the appeal for outsourcing: You don't need to invest in a (lot) of IT staff to cover a whole host of technologies.
But for the larger bodies, why outsource? It's going to cost an arm and a leg in lawyers fees to negotiate & manage a contract. Surely that could be better spent within the body concerned?
Oh - I know why: It's so government mandarins can get cushy jobs once they've awarded the contract.