Changes to the state pension age may discriminate against poorer classes.
Builders, packers and cleaners have a lower life expectancy than higher paid workers.
Almost a fifth of the poorest men in the UK die before they are eligible for a state pension, indicating that raising the retirement age is unfair to lower paid workers who do manage to survive beyond 65, a Labour MP has warned.
Research for former pensions minister Malcolm Wicks has shown that 19% of men from the lowest social classes, including cleaners and manual labourers, die before the age of 65 compared to just 7% of men from the highest social group.
It also highlighted that 10% of women from poorer backgrounds die before they reach 60 compared with 4% of women from a better off demographic.