1. I don't buy anything.
2. I earn money.

Therefore, my money is saved.

1. You don't need to eat? You don't have a shelter? How about internet costs?

I don't pay for any of those.

So you are supported by some other.

They've shown that people will very consistently buy a $1.50 pastry instead of a $1.75 pastry, and so on. But it seems that it's the percentage that plays the biggest part in the spending instinct. Because when making a big purchase, increasing the price a few % doesn't matter much to people--even though it likely wipes out all the money they've saved on pastries in their entire life. Seems like that's a blind spot to watch out for.

Probably the best way to save money from a philosophical point of view is to be happy with your life. People who are unhappy buy things much more often.