People have been saying this and it has been happening; it sounds like you may be unfamiliar with how many jobs are regularly shifted overseas: “Since Trump’s inauguration on 20 January 2017 to 31 July 2020, over 308,000 workers have been certified for trade adjustment assistance benefits.” The history of off-shoring manufacturing is also pretty well known. Articles about the US’ resulting woeful lack of manufacturing capacity are easy to find.

https://www.theguardian.com/business/2020/sep/12/us-corporat...

Edit: spelling

2nd edit: noting these are not tech specific jobs, but the trend is there.