I can think of lots of JWs who didn't save a dime of what they earned because they reasoned that the scripture says they will "throw it in the streets", thus no use saving it.
My parents encouraged getting a GOOD education, getting a GOOD job, and SAVING for the future. My dad said many times, "Savings are stored labor." In order to live in later years one can either spend our "stored labor" in the form of savings on life's necessities, or you can work until you drop and spend labor that you may no longer be physically able to spend.
I know several JW's in their 70's and even 80's still trying to spend enough physical labor to make ends meet, when they could be doing what I am doing, ten to twenty years younger than they are, and living life debt free and carefully spending my stored labor set aside over several decades of physical work and investing/saving.