When Traitor Johnson talks of the "Remainer elite", he means people who think and question, people who value reasons and facts, people who refuse to swallow the lies through which his venal, crooked, corrupt elite faction seeks to control the country.
Of course what Brexit leaders mean by the elite are precisely those whose penchant for thinking and reasoning is alien to the decent real people of Middle England who navigate politics by commonsense, prejudice and three word slogans. Wealth is not elite, thinking is. 
In the old industrial society people hated the owners and bosses. Now they hate the knowledgeable who tell them what they should believe and how they should think and act. They crave a return to a simpler world, but in their hearts they know it is forever gone - hence their rage.
Listen to the way Trump and Johnson speak. They speak like idiots. Johnson may be posh, but he speaks like a posh idiot. At no point do either Trump and Johnson make their supporters feel belittled by their leader's intellect.
