The gold-plated fund banks the average EU official £59,000 – and allows the most senior Brussels bigqigs to draw a maximum of £166,000 in yearly payments in retirement.
And according to analysts, Brussels could demand Britain pays between £4.4billion and £5.7billion during Brexit negotiations.
A senior Brussels source told MailOnline: “Commitments have been made and this is not theoretical.
“These are commitments which exist and we need to make sure that the UK lives up to its part of these commitments.”
The average Brussels pension payout of £59,000 is more than twice the average salary of British citizens.
Mrs May could face uproar if she agrees to pay the bill
Brexit debate in pictures
Mon, April 17, 2017
The debate in the European Parliament in Strasbourg will focus on key issues of the Brexit talks including reciprocal rights for EU citizens, the peace process in Northern Ireland and trade
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Former leader of the UK Independence Party (UKIP) Nigel Farage (L) gestures as he speaks with EU Commission president Jean-Claude Juncker (R) prior to a debate on the conclusions of the last European Council, at the European Parliament in Strasbourg
Lord Kinnock is among the biggest beneficiaries of the EU pensions pot
It is also almost three times the average £21,800 yearly income for retired households in the UK.
Among the 22,000 retired EU officials currently benefiting from Brussels’ exorbitant pensions pot are around 1,730 Britons.
Former Labour leader Lord Kinnock, who is said to one of the most generously rewarded by the scheme, reportedly draws an estimated £87,000 from his role as vice president of the European Commission.
Lord Mandelson draws more than £30,000 annually from the plan
Peak inside the £270m home of the European Council
Tue, May 16, 2017
This will become the new home of the European Council
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Lord Mandelson, a diehard Remainer and former EU trade commissioner, is paid around £34,600 by the plan, according to reports.
Zsolt Darvas, a senior researcher for the think tank Bruegel, said EU pensions are “incredibly generous” compared to similar schemes in EU member states.
He added: “It really is a huge amount but it was agreed by the member states.”