it should ... just be tied to the growth of annual earnings
I don’t understand what you are arguing.
For five of the last eight years, the State Pension increase has been based on average earnings growth. It would have been six from eight had the earnings element not been suspended when considering the lock for April 2022.
• April 2026 (4.8% increase): Based on Average Earnings Growth (May–July 2025).
• April 2025 (4.1% increase): Based on Average Earnings Growth (May–July 2024).
• April 2024 (8.5% increase): Based on Average Earnings Growth (May–July 2023).
• April 2023 (10.1% increase): Based on September 2022 CPI Inflation.
• April 2022 (3.1% increase): Based on September 2021 CPI Inflation (after suspending the earning element)
• April 2021 (2.5%) Minimum increase
• April 2021 (3.9% increase) Based on Average Earnings Growth (May–July 2020).
• April 2020 (2.6% increase) Based on Average Earnings Growth (May–July 2019).
Wage growth causes inflation whether:
* Cost push - businesses increase the price of goods and services to pay for wage increases, or
* Demand pull - more money in the economy chasing a limited supply of goods.
Pensioners on fixed incomes are exposed to the higher prices which follow from earnings growth.
Furthermore, when based on average earnings growth, the SP is not increased until a whole year after people have had those wage increases.
SP is paid in arrear, so even though the SP rises from the first Monday on or after the 6 April, the higher amount is not paid until May. Always playing catch up.