Uncontrolled immigration: the theories

I read a provocative cartoon. It went something like this: <<Who wants uncontrolled immigration according to populists? The "do-gooder progressives". But who really wants it? The "industrialist-capitalists" (meaning anyone who needs a pool of cheap labor).>>
I've never been much of a conspiracy theorist, but the second thesis convinces me more than the first. First of all, because it makes more sense. Why on earth would ordinary people, based on their political views, wish for uncontrolled immigration with all the public order problems it entails? The others, those in the second scenario, instead have very concrete interests in importing low-cost workers. And besides, as Americans say, if you want to untangle a mess, "follow the money". And it's pretty clear where the money trail leads.
Be careful though, this completely dismantles the other conspiracy theory about it. The one about ethnic replacement, which according to lovers of the most fanciful hypotheses is supposedly pursued by the usual pluto-judeo-fascist-marxist-nonsense cabal.
Whoever wants cheap labor is interested, as the very expression says, in the cost of that labor, not in its ethnicity. Ethnic replacement would at most be a consequence and not the goal of the mechanism.
Ironically, once replacement has occurred, the "capitalist industrialists", or whoever acts on their behalf, in order to save on labor costs would go looking for super-Christian, marginalized white people, thus setting in motion a process of ethnic replacement in reverse.
A vicious circle in short. The usual blind alley that those who believe in fanciful theories get themselves into just because they have the charm, precisely, of fanciful theories.

This post was machine-translated from Italian.