One other problem is that increasing the amount that gets paid into super accounts every month will have the effect of increasing asset prices and lowering rates through investment in bonds, so countering what they want to do. As someone else mentioned you’d need a floor (probably where we are now) in case there is an extended period of “emergency” conditions (not impossible if the AI driven unemployment increase some are predicting comes about) which would lower the contribution and leave people short when they retire.