That's perfectly fine too. If you aren't going to invest the money, that's exactly what will happen. You use TVM - time-value-of-money - to compare multiple options of what to do with some money.
For an economist (and I'm not one so I don't know), they probably use the real growth rate of the economy in their calculations, because this is what the country in question has been shown to do with its money. The real growth rate takes growth and inflation into account.
For an economist (and I'm not one so I don't know), they probably use the real growth rate of the economy in their calculations, because this is what the country in question has been shown to do with its money. The real growth rate takes growth and inflation into account.