Having just economists is one idea.
However, it would appear that the Prime Minister has made some bad choices recently. I will not name names, but some members might guess some of those names.
I think there could be a case made for some sort of blue ribbon committee or advisory committee that would advise the Prime Minister and give recommendations or summaries of what it thought of the qualifications of certain people. Constitutionally, I think the Prime Minister has to have the last word, so he would not have to necessarily accept that advice. However, I think there could be a case made for that.
I also think we cannot determine this with any finality before we hear the position of the Supreme Court.