Could you clarify what you mean, please? Surely the argument is that some politicians busy undermining the EU and promoting leaving it, or other manoeuvres born

Could you clarify what you mean, please? Surely the argument is that some politicians busy undermining the EU and promoting leaving it, or other manoeuvres born out of Eurosceptic populism, also used the EU as a way to shield themselves from responsibility for unpopular laws via passing them "abroad", which they could use to then rally their domestic basic on Eurosceptic grounds, isn't it? You seem to be saying the opposite.