The Office for Budget Responsibility (OBR) says the UK state pension “triple lock” is a key factor behind growing pressure on public spending. Under the triple lock, the state pension increases each year by whichever is highest of three measures: inflation, wage growth, or a fixed 2.5% uplift. The OBR’s assessment links the mechanism’s guaranteed minimum and responsiveness to wages and prices to higher projected pension spending over time. As a result, the triple lock contributes to how much the government may need to allocate to pension-related costs within the wider public finance outlook. The OBR frames the issue as part of broader pressures on public spending, with the pension uprating rules playing a significant role in determining future spending levels. The reporting across outlets centers on the OBR’s warning that the triple lock’s design can raise costs when inflation or wage growth is higher, or when the 2.5% floor applies. No alternative outcomes to the triple lock are described in the provided sources.