Andy Burnham says tough decisions will be needed to fund a new national care service, fueling speculation the government could abandon its triple lock pension commitment.
One letter argues that targeting private pension tax relief, which costs £84bn a year, would be fairer than scrapping the triple lock outright.
As Britain faces fiscal pressure, commentators are urging political parties to address the costly pension guarantee ahead of the next election.
Correspondence published by The Guardian shows divided views on whether Britain's pensions triple lock should be reformed, with some readers highlighting the relatively low value of the UK state pension compared with European averages.
A BBC report explains the mechanism designed to protect pensioners' incomes from inflation and wage growth.
Pensioners could see their annual income increase under the government's triple lock policy, according to a BBC report.
Slowing pay growth triggers a smaller rise under the triple lock, but the pension is still expected to surpass £13,000 a year, reviving debate over its long-term cost.
Continued job cuts by British companies coincide with slowing pay growth, a figure that could trigger a 3.9% rise in the state pension next year, according to reporting by The Guardian.
Slower wage growth feeds into the triple-lock formula, pushing the state pension past the income tax threshold, while new labour market data shows continued weakness in payroll employment.
Slower wage growth of 3.9% is expected to trigger the increase, pushing the state pension above the frozen tax-free personal allowance and reviving debate over the triple lock's affordability.
With the budget approaching, debate intensifies over whether the government can continue to afford the state pension guarantee popular with millions of Britons.