This was a state in ruins under foreign military occupation, with about half the territory and population of the former German state that had incurred those deb

This was a state in ruins under foreign military occupation, with about half the territory and population of the former German state that had incurred those debts. OK. So, the Greek government officials who ran up Greece's debt are responsible for that debt. The current government isn't, and in fact the current Greece is in economic ruin courtesy of years of "austerity" imposed forcefully by foreign powers.