I think that's probably an outlier example. Australia temporarily has had reasonable economic growth without generating high inflation because of once-off structural shifts in the economy (see
here). At the same time, fears over the booming housing market resulted in deposit requirements being raised for Australia's retail banks, leading to higher deposit rates.
Logically you would not normally expect deposit rates to be higher than the rate of inflation as it would siphon money out of the economy, away from productive uses. The best that savers can hope for is that the two are not so divergent that their money is eroded quickly. From what I can see (and as I said, I'm no expert) the difference between deposit rates and the headline rate of inflation is actually
lower in the current low interest rate environment than previously. This is what I think savers should be looking at, rather than being discouraged by nominally low interest rates.
Inflation can go to zero and negative, whereas -- as CiaranT suggested on another thread today (
here) -- there tends to be some resistance to deposit rates going to zero.