An example of foolish frugality -
A neighbor lady was making a baby quilt. What she used for batting - against my advice - was a very old, very skewed, wonky, would not lay flat no how - blanket. Several years later, she did admit that using that blanket was a bad idea!
The really weird thing about her insisting on using that was that this person COULD afford to buy decent batting. She probably even had some around the house, because she did a lot of crafts.
There is nothing wrong with using recycled blankets, mattress pads, flannel sheets, etc. for the middle of a quilt.
But when the blanket was just plain out of whack - that was foolish because it was impossible to get the outer layers to lay flat.