It is more difficult to see the positive effects of expert workforce in large economies such as the US, but it is easier to observe how smaller but rich economi

It is more difficult to see the positive effects of expert workforce in large economies such as the US, but it is easier to observe how smaller but rich economies rely on foreign experts to compete: Switzerland and Singapour being two of such example. Those countries create strong incentive for expert immigration, in various fields, financials, engineering, academia, healthcare. A large portion of the workforce was not train in the country, and innovation both in academia and the private sector is often lead by multi-national teams. It is a classic pulsion of conservatism to try and severe the ties prone to increase the flux of information and people, but in the long run it will hurt the economy. Because if you are not doing it, others will do it and reap the benefits of freely trained experts and innovators. One key example is the migration of scientists during WW1 and WW2, which benefitted the US immensely and insured its supremacy over the second part of the 20th century.