Although there is a proviso excepting "persons with technology skills needed by the country," there are few precedents in practice, and this provision is very difficult to make use of. The problem of attracting foreign workers is further complicated by sharply declining birth rates and aging of populations that have caused many countries to relax restrictions on foreign workers or immigrants.
近年來，除了為爭奪人才提供誘因外，嚴重的「少子化」與「高齡化」隱憂，也逼使各國逐漸開放「移工」與「移民」的界線。