@Paul *******
have you ever lived in Australia? You're quoting Australian pension rates and speak about pension qualifying ages, but don't mention anything about the taxation system and how pensions funds are raised.
This is what I understand: a UK pension is contribution based, meaning a person has to 'contribute' throughout their working life, 'separately' from the tax system which pays for day to day goods and services. Correct me if I'm wrong, but that's how I've seem it explained more than once. If that's correct, then if one didn't 'contribute', one wouldn't receive a pension, right?
Australian Pensions are tax based, meaning that pensions come from taxes collected throughout the year. Everyone pays (or at least is legally obliged to) taxes every year, through income taxes and "Goods and Services Taxes" (GST, a tax on such things as foodstuffs, clothing, Utilities etc.). When an Australians start receiving the Aged Pension, they may not be working any longer and therefore, not paying Income Tax. They do however, still contribute towards taxes when paying for things such as foodstuffs, clothing, Electricity, etc. etc. (GST)
If an a Australian leaves the country to live overseas and they're no longer contributing anything to the Australian Tax System, if they no longer qualify as Residents for Tax Purposes, then the Government can rightly say that they're no longer entitled to an Australian Pension.