One financial lesson they should teach in school is that most of the things we buy have to be paid for twice. There’s the first price, usually paid in dollars, just to gain possession of the desired thing, whatever it is: a book, a budgeting app, a unicycle, a bundle of kale. But then, in order to make use of the thing, you must also pay a second price. This is the effort and initiative required to gain its benefits, and it can be much higher than the first price.
I can see the phrase working if we talk about the entire chain from production to end consumer. I go to the store, I buy something. The store had to also buy that thing so they could sell it to me. Right there, it was already paid for twice. Just not by the same person/entity.