Australia has 2 schemes. The aged pension & superannuation. The pension is a welfare payment calculated based on your income & assets one you hit 67.

Superannuation is different in that it is your money held in trust until you reach preservation age (60 for most Australians). Each Australian employee is forced to pay 11% of their gross income into a superannuation fund.

The trouble with superannuation funds is that they are subject to the same aging demographic problem. Most funds invest in equities, CRE & bonds. As our population ages and consumes from these funds, the investments don't benefit from the forced saving as much. It becomes another ponzi only it's felt in declining superannuation "yields". 

The saving grace in our system is that you can set up your own superannuation trust/fund & manage the investing yourself. My self managed fund is very heavily invested in Bitcoin which has performed quite well over the last 4 years. Currently none of the managed funds offer exposure to Bitcoin.