With both the politically correct Left, and the vile economic greedy Right of big business pushing for ever greater population numbers, maybe a wee bit of reverse psychology is needed in debating these creatures. The slippery slope argument has been around since the Greek philosophers, and nobody has solved the problem, which trades on vagueness. In areas where there is a continuum, there are never precise cut-off points. So the Left want one million refugees per second. Yes, but why stop there, why not one million + 1, + 2 +3 +4… and so on for infinity. Of course, there are not an infinite number of refugees, but it is the principle that matters. If there were, the Left must take them in, since there can never, in the magic world of anti-white racism, ever be any cut off point for coloured migrants. Only white South Africans can be excluded because, well, they are white and the Left really is anti-white. How else to explain their protests against the white refugee farmers?
So, if necessary, fling their own arguments back at them. As for dealing with the Dark Demons of Big Business, don’t bother because logic is just like water off a duck’s back to them. The only thing they can hear, is money. If they can make a buck and the universe burns, with them in it, that must be a good deal. The pathology of monetary greed is far beyond logic and dwells in the realm of socio-pathology.