Re: Competence? We've heard of it.
I noticed a part of this a few years ago. Instead of a few politicians with powerful departments there were many politicians with their own department, each with overlapping responsibilities.
Generally speaking, the Government likes having lots of ministerial departments. This is particularly true if they have a small parliamentary majority like the last few governments had. This is because each ministry needs some ministers. And each of those ministers gets a very respectable salary for the part-time job and other perks like civil servants to fawn over them, a nice office, a Government car with a driver etc.
What they do with all that is mostly irrelevant to the proceedings, because the great benefit is that someone in a ministerial billet is unlikely to rock the boat in any way, since they risk being sacked and losing all these things.