[probablynish]

The article says that most of these approvals are going to tech entrepreneurs / startup founders. The effect of this seems to be to create new companies that otherwise wouldn't have existed, spurring demand for tech workers. The net effect of this is upwards pressure on wages if anything.

More generally, if another country became the global nexus for top tech talent, capital would eventually follow there, and the long term effect on US tech salaries would be negative.