This is a problem across the civil service, although not as stark as this example usually. The cult of the generalist has long meant that specific skills are considered almost worthless. Instead of the civil service being an assemblage of people with different skill-sets, it instead consists chiefly of administrators with no more skills than a high-school graduate (although they do have tertiary degrees). Jobs which…
There are 3 kinds of consultants - experienced civil service employees that were poached because they were underpaid - so now the consultancy pays them 80k instead of 50 but charges them out for a fortune.
Or they are generalists working for the consultancy, and are about as skilled as the civil servants themselves.
Only a small fraction of consultants are really so specialised that you only need the expertise occasionally and should be contracting them