The problem as he sees it is if so much money is created there will be inflation and if it will also be leaking out of the country via imports the currency may be downgraded by the financial powers that be.

That might be true with an economy that was not developed or under developed, and with the same biased, orthodox and blatantly self interested financial “authorities” deciding whether or not a currency is strong or weak….without looking at the actual economic realities “on the ground”.

Neither Keen nor MMTers see the paradigm changing effects of combining the universal dividend and 50% discount/rebate policy at retail sale, and that’s why they think this either is or isn’t a problem. It could be a problem either way….unless you resolve both problems  with the policies and structural changes of Wisdomics-Gracenomics.