What's the rationale for aiming for low CPI?
Again, in the words of the
RBA:
The Reserve Bank of Australia (RBA) is responsible for formulating and implementing monetary policy. The Board's obligations with respect to monetary policy are laid out in the Reserve Bank Act 1959. Section 10(2) of the Act, which is often referred to as the Bank's 'charter', says:
"It is the duty of the Reserve Bank Board, within the limits of its powers, to ensure that the monetary and banking policy of the Bank is directed to the greatest advantage of the people of Australia and that the powers of the Bank ... are exercised in such a manner as, in the opinion of the Reserve Bank Board, will best contribute to:
(a) the stability of the currency of Australia;
(b) the maintenance of full employment in Australia; and
(c) the economic prosperity and welfare of the people of Australia."
Since 1993, these objectives have found practical expression in a target for consumer price inflation, of 2-3 per cent per annum. Monetary policy aims to achieve this over the medium term and, subject to that, to encourage strong and sustainable growth in the economy.
Controlling inflation preserves the value of money. In the long run,
this is the principal way in which monetary policy can help to form a sound basis for long-term growth in the economy.
Would this not be a tactic rather then an end goal?
In truth it is a bit of both, in that a low, stable CPI is an end goal but, more importantly, seen as contributing to the larger aim of having an economy that supports and fosters sustainable growth (refer to my post above re: aims of policy).
...ie if salaries went up in line with costs what does it really matter.
In that particular case it simply would mean that real wages would have been maintained.
High inflation (and different people may have different definitions of what that is) is undesirable.
High inflation brings with it numerous costs. Notwithstanding the erosion of the purchasing power of each dollar which I am sure everyone here is familiar with (this is the main cost of inflation where real incomes are not maintained), other costs include:
a) Adjustment costs - price lists and prices have to be continually adjusted to keep current with CPI
b) Search costs - the higher the CPI, the greater effort that consumers will put into making informed choices in an attempt to find the cheapest prices.
A certain level of inflation is desirable (again, open to some debate) as it represents an economy experiencing growth spurts (pressures to get larger) and in this respect it is healthy. Beyond a certain point (high single digit % pa or above I would suggest) inflation represents an economy out of control and this undesirable.
Developing nations often experience higher levels of inflation (because, among other things, they typically experience higher levels of economic growth), but in mature 1st world economies the inflation appetite is much lower.
M