The EU must decide what to do after Britain's MEPs leave the chamber for the last time
Some Europhiles want them replaced with pan-European politicians to the cost of the taxpayer.
But critics said the EU is already unpopular enough without funding positions for more politicians.
It would create the coveted "more Europe", which Jean-Claude Juncker has mentioned on numerous occasions, at a time when anti-European sentiment is growing within the general populous.
Paulo Rangel, a member of the EPP from Portugal, said the pan-European lists would “create more Eurocracy” at a time when “the mood is not very pro-European”.
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The idea of a pan-European list first reared its head in 2011 when it was floated by Andrew Duff MEP, but despite making it through the constitutional affairs committee it was deemed too integrationist and was never adopted.
Constance Le Grip, a member of the European People’s Party, thinks the move would be very un-European.
She said: "Electing MEPs without roots, without any marked out territory, would be contrary to our efforts to get citizens closer to European lawmakers."
The powers that be may decide to introduce pan-European MEPs
An alternative option would be to get rid of the 73 British seats, which would be the easiest and cheapest answer to the problem.
A report published by the Bruegel think-tank said: "The number of seats per country would remain unaltered, which may be politically the easiest solution.
"This would represent a step forward in the process of integration and the creation of a European democratic space."
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Another option would be to distribute the seats among the remaining countries after Britain leaves the EU.
However, it is feared this would "dramatically increase the inequality of representation", according to the Bruegel report.