Many of us older guys can remember the members who lived in PMQs, many of senior rank (NCM and officer), who had big trucks, a second car, a boat, an ATV and a Snow machine or two. These types will always be around, and when hard times hit them, financially or Release, they wonder where their bank accounts disappeared to and the hardship that follows. Some of the more senior members here can remember RSMs who retired and then had to be hired on as cleaning staff in the Shacks in order to make ends meet.
Your example of a member being a little frugal and buying a home, shows that with some planning one can plan for retirement and not become a pauper. The end goal, is to live a life that you can maintain, not one that you can't, and that would mean planning for that 'rainy day scenario' and eventually retirement.