How do you fight sleaze? As every populist knows you look for scapegoats, the French are handy, but there are always refugees, you summon up racist images and panda to the most obnoxious. Deflect attention from the blatant sleaze onto other topics. Talk shit.
It worked for Trump and Bolsonaro, Oban, Modi and Erdogan. It is working for Johnson.
They are getting away with murder and will walk away rich beyond belief.