As with most things like this, the question of �fairness� does not enter into the argument.
These problems arise because the State Pension scheme is regarded as a �benefit� and not as a pension in the accepted sense of the word. Most people in receipt of a State pension have paid into the scheme via their NI contributions. Many have paid far in excess of the amount that would be required to secure a pension equivalent to the State level had they paid into a private scheme. These same people receive the same (and often less) than those who have paid in little or nothing at all.
The result is not a pension scheme at all but a tax where the benefits paid bear little or no relationship to the contributions made. In fact it can be better described as a State run Ponzi scheme, where the payments made by current contributors are not invested for their future use but instead are used to pay current claimants.
The government only provides increases to pensioners living in the EEA or in a country with a reciprocal Social Security arrangement. No private pension provider could get away with denying to those recipients living abroad the increases paid to UK resident recipients with such an argument. They would swiftly end up in court.
The inflation rate argument put forward by TCL does not hold water. Pensioners in places such as Jamaica, Mauritius, Bermuda and Israel are certainly not subject to UK economic conditions, but they receive an annual increase nonetheless.
This situation will continue unless and until pensioners who have contributed to their State pension are treated as pension recipients and not Social Security claimants.