I'd like some more info on what you call oligarch's.   I don't doubt it, I just don't know anything about it.   As far as remitance goes it is often spent on American goods, (it won't work in the 'official' Mexican market, but I'm sure the blackmarket is active with dollars).   Just saying those dollars are still, in most cases, going to be used to purchase American goods.

Question;   We don't hear the term oligarch's in the United States.  But aren't specific tax breaks for industries, even particular companies, part of the building blocks of a nation where large Corporation have strong influence in political legislation?    (please note, I did not pick out a specifici industry or political party.    It seems obvious to me that the Energy Industry has major players and Trump has unleashed the hounds to boost multiple petroleum based industries.   

Oligarchy: highlite are right click for definition.     You might note Goldman Sach's influence on the financial regulation.