We have one car even though we could afford two, we both share our commute to work, I drop off my husband on my way to work and pick him up again on the way back. Most couples would buy too cars but we feel that our money is much better used on fun stuff than a second vehicle. A second vehicle is a large money sink for a small amount of convenience.
I made $30k a decade ago when I lived in the Midwest ($36,000 in today's dollars) and lived very, very comfortably on that. Making more than double that now along with two incomes allows us to have the sorts of comforts and luxuries I couldn't have at $30k (homeownership, guest rooms, expensive travel, booze/restaurant money, coffee at DDs every day) while still saving.
We are happy and we are very blessed. We could buy more but we are happy with less. Part of why we save so much is to avoid being wage slaves as I don't feel that to be an ideal lifestyle.