in-laws. They are in their mid-30's and are struggling to provide for their families because of their crappy jobs, but they refuse to look for a job outside of Utah County. They are pretty reliant on my in-laws. They are amazing hard working guys, but their refusal to expand their horizons has limited them and their families in many ways.
From a separate point of view, having lived in Utah for half of my adult life and in three other states for the other half of my adult life, if I could take even a quarter of the Elders Quorum from one of my Utah wards, and put them in my old wards in Michigan or California, they would make a remarkable difference. In most cases I think their kids would thrive, because the youth in those small non-Utah wards really bonded. Instead they are languishing silently, contributing little, and may even feel forgotten in their over-sized Utah ward.
With these two anecdotes in mind, I strongly believe that Elder Perry is not alone among general authorities in thinking that members would "enrich themselves, the church, and communities by taking jobs elsewhere (outside of Utah)".