Swan implements Turnbulls's policy. Yes, the Australian government will buy home mortgages - an amazing backflip involving $4b. OK, so no-one really knows what they are doing in the current volatile situation but sometimes the low-brows in the government's benches might consider opposition suggestions.
Anyway imitation is the sincerest form of flattery. After criticising Turnbull's pronouncements Swan is doing exactly what Turnbull suggested - to buy mortgages in order to increase competition in the mortgage market.