I don’t get the confusion, with 100$ you can either buy two pairs of shoes for 50$ each or buy a better pair for 100$. It’s up to you how you want to spend your ressources. You can either think in the long run, you would be better buying two pairs of shoes to last longer than one pair of shoes but what if you had a date and wanted to pull everything off in this specific moment, then you would go for the 100$ pair of shoes. 50$ don’t let you buy a 100$ pair of shoes, but 100$ let you buy two pair of shoes at 50$ each.