Originally posted by @Eric James:
A lot of people who lived through the great depression were extremely affected by it for the rest of their lives. I knew an older couple who were relatively well off. Because they had lived through the GD they wouldn't spend 30 cents extra to get blue cheese dressing at a restaurant.
Because someone's attitudes were affected by a traumatic event doesn't necessarily mean they are correct. Just sayin.
My parents grew up during The Great Depression, so I inherited their basic attitude towards spending money (as in "no, we can't afford that"). Then I learned to think "how can I afford that" as I went through life. But I've merged the two approaches now to think "how can I afford that without going into debt to get it" (even if the debt is considered "good debt").
The problem with "good debt" (borrowing money at a low rate of interest and investing it at a high rate of return, also known as the "carry trade" or "leveraged investing") is that when the world goes through an economic calamity, the high rate of return comes to a halt, but the low rate of interest on the borrowed money continues to be owed (based in my experience with a HELOC used to finance various purchases of income-producing assets over the years).
Also, if the asset used to secure the borrowed money goes into free fall, the lender sometimes has the right to reset the loan (in the stock market, this is known as a "margin call"). One is forced to sell this asset at exactly the wrong time to raise the cash needed to meet the margin call. As Warren Buffett puts it: "It's insane to risk what you have for something you don't need."
"Good debt" can morph into "bad debt" in the blink of an eye.
I've gotten to the point where I won't even use discount coupons anymore. I discovered that I was spending $9 to save $1 on a $10 item I didn't really need (and perhaps doing so to impress people I didn't even like).
However, I agree that frugality can sometimes go to unhealthy extremes. Every once in a while, there is a news story of an older couple who froze to death in their apartment in the middle of winter because they didn't have their furnace turned on. But some of these people also had a savings account with a $100,000 balance in it, suggesting that they could have afforded the power.