With more Silicon Valley firms opening up in Europe, Berlin especially, I have heard that it's causing salaries for all engineers to be pushed hire as these new

With more Silicon Valley firms opening up in Europe, Berlin especially, I have heard that it's causing salaries for all engineers to be pushed hire as these new entrants start paying bonkers numbers. Apparently when Tesla opened in Berlin they were paying such high salaries that local companies got upset. I think it's come down some but why? It should go higher.