It feels like you're only thinking about it at a personal level.
From a higher level perspective, we didn't give them those cars, they bought them. And buying them provided tangible benefits to the people who made them and the companies that serviced them, etc. The money was freed from the dragon hoards of the unproductive and actually SPENT on something. Spending is useful. Hoarding isn't.
Could it have been better spent? Sure, but spending it at all is better than leaving it to rot collecting a few points interest without actually producing anything of value.
From a higher level perspective, we didn't give them those cars, they bought them. And buying them provided tangible benefits to the people who made them and the companies that serviced them, etc. The money was freed from the dragon hoards of the unproductive and actually SPENT on something. Spending is useful. Hoarding isn't.
Could it have been better spent? Sure, but spending it at all is better than leaving it to rot collecting a few points interest without actually producing anything of value.