It's the public sector pensions that is a big economic burden in the UK. The public sector get far more than anyone else. In fact, some GPs have had to retire early due to their pension pot reaching £1M. These pensions are being funded by those that can't afford to save for their own future and pensions.
This is a good article from the Daily Telegraph, titled, 'Have-nots are footing the bill for Britain's privileged public sector'. In my day, that was a reason that many people went to work in the public sector, a job for life and for the sizeable pensions.
https://www.telegraph.co.uk/money/pensions/pension-inequality-gap-growing-have-nots-foot-bill/
Has far as I'm aware even the MEPs from the UK that were elected to the EU Parliament are still entitled to their pensions from the EU parliament too.