Why are faculty positions in Management Information System (MIS) going down?
At least for central Europe, the number of faculty positions is definitely going down, but instead there is more money for project-based PhD positions. Unfortunetly these are usually just for three years, a timespan in which, at least in my field, most students are not able to finish. So PhD students employed in a project often become project hoppers or are unemployed towards the end of their PhD.

In general, this development from faculty positions to project-based positions is not all bad, since it requires the PIs and professors to constantly improve. The downside is the time lost for writing grant proposals and the uncertainty if a position will be funded or not.