You could, but basically it is a workaround for the inability to globally set a Master Page position in the layer stack. It would be nice if in the Master section of the Pages Panel there was a right-click option to move the selected Master to the top of the document page stack on every page that used it.
I've always just used ctrl click (mac)on the page number master, in the layers panel, and select edit linked, move the master to the top of the layer stack then click finish, which moves page numbers to the top of the layer stack document wide?????