There is an element of internal competition. At times, departments even try to outbid each other. For example, doing a certain kind of work in one organization may put an employee at level Y while, in another organization, it is level X. As a result, knowing that, employees can ask to go to a different level.
In a way, it perhaps reflects the classification structure. The positions, and the nature of the work, have changed. So we have to ask ourselves whether the classification reflects those changes. If not, perhaps that is what partly explains the adjustment. The office of the PSC's Chief Human Resources Officer would be better able to answer that question, but there are all kinds of valid reasons. Sometimes, it is in order to provide a salary increase; sometimes, it is to attract people or to compete with other departments when there is a shortage. By definition, an internal market is closed, so internal shortages can be artificial. If things are opened to people from the outside, the shortage is no longer the same, and may even become a surplus. All these factors come into play. I do not think that we are able to talk in percentages and say that 20% is because an artificial shortage has been created internally and another 20% is because of a disconnect between the nature of the task and the way in which it is accomplished.
I remember very well that, when I came back, there was a computer on my desk. Previously, I would give my documents to an assistant who would type them, and so on. Now I do not have an assistant of that kind because it is no longer necessary. What I expect from an assistant is different now, but the classification has remained the same. So we say that the “secretary“ category, for example, has practically disappeared because we do the work ourselves. Now, we need people who are much more skilled in document formatting and presentation. That requires a knowledge of software, or knowledge of other kinds. But we may not have changed the classification, and we need a different classification to recognize the different expertise. All those factors are involved; it is quite complicated.