It's not something we have developed.
We know, by talking to certain senior public servants in specific areas—notably IT—that the use of consultants is much more expensive than doing the same work in-house with public servants. In that case, the issue is the availability of the skills and the expertise. In many areas, even if the public service wants to recruit more IT specialists, it cannot. That's why, in large part, it's relying on consultants.
However, we have not done this study.