To an extent true, but because the voters don't go as hard domestically on single issues like they did with the EU, instead remaining 'loyal' to a party and just not voting if the don't approve of actions (which never do, never be loyal to ANY political party) it's allowed the politicians to not really fear the electorate that they'll easily lose their job if they go corrupt.

It's always best to have politicians fear that if they fuck up, they will quickly lose their power.