I think your assertion that inflation (money printing) is necessary for inflation is wrong and certainly not obvious. Investment necessarily comes from savings. One must not eat some of this year’s corn so as to have next year’s seed. Whether state-forced savings through inflationary bank loans is better than voluntary private savings should be answerable by studying history. Was there better investment historically in countries where the state devalued money in favor of banks, or in countries where money was not devalued?