It seems I've tried everything to bring forward page numbers applied by Master from behind the layers on the pages. The instructions state: 'assign a higher layer to an object' on the Master. It doesn't work either...anyone? I am sure it's something silly...Text wrapping instructions don't work either.
Stacking (Bring to Front, Send to Back) and Layers (Layer 1, Layer 2, etc.) are two different things. I think that by default, master-page items are behind document-page items if they are both on the same layer. Instead of bringing the page number to the front of the same layer that all of your document-page items are on, try making a new layer, assign the page numbers on the master page to that layer, and bring that layer above the layer that holds all of your document-page items.
Thanks, that makes sense!