More goods and services mean more wealth, because that is the definition of wealth. More goods and services compared to last year, means that the productivity has gone up. If this happens and nothing else changes, prices measured in money go down and the value of the money goes up, because that is the definition of value of money. So you don't need more money. You never need more money, a fixed supply is always enough.
And now compare what I made bold in your quote with what you said before, that is "I do not consider economy growth as input to the money value function. Some do, but that is based on flaky statistics". You seem to be contradicting your own words.