Hotel desk clerks have gone through the same transition.
The average wage for a desk clerk has not kept up with inflation over the last 20 years.
I think most foreign born employees in banking and in white collar hotel jobs are probably legal immigrants who have a Green Card or citizenship since they handle a lot of money and credit card information.
The financial sector is filling with foreigners (primarily Asians) - replacing skilled/trained American workers; when Occupy Wall Street was protesting in front of their former employers in the financial district (when the movement started, due to mass layoffs), you could see on the TV their foreign replacements filing into the buildings behind them - to fill the positions the Americans had held weeks before.
It IS the “Great Replacement”, make no mistake about it.