GDP is not a good measure of actual economic production and it is too easy to cook the books. Why would any sane person / consumer want price inflation. Price inflation due to money printing only benefit those near the source or can borrow at low cost, the value of the "new" money comes from diluting the existing money. If a public company issue 2% extra stock and give to management would that not be the same kind of robbery that is happening with the central banks.
Money supply should be at a fixed rate to how much gold is in the vault. You want more money put more gold in the vault. That would make price of products and service go down thus good for savers instead of this nonsense right now. This crazy Keynesian experiment has gone on for too long.