I don’t know specifically about the US Army but if any institution tends to get filled up with, as the author contends, ‘low quality of recruits’ and ‘mentally challenged’ then it becomes a much less appealing career choice for those who do not fit into those categories.
I have a hard time getting excited about any plan which requires foreign nationals when we have 330 million citizens and various others here.
I was in the AF at the end of Vietnam and supervised a lot of these types. They joined the AF to keep from getting drafted and going to Vietnam. They didn't want to be there and it was a full time job just keeping them at work.
The new warfighting systems are much more complex than they were 40 or 50 years ago and it takes someone with an average IQ or above to operate and maintain them.
The Navy took in a lot of folks as a Democratic social experiment and made them Non-Rated. They weren't assigned to a specific career field. They spent their time painting and working as an assistant in the mess hall. One of the problems this created was that once a guy has been in for 5 or 10 years, there's no slots to promote them to. They aren't skilled enough to supervise anything and they can't get promoted.