Чтобы делать подобные заявления, насколько я понимаю, нужно владеть или по крайней мере иметь знания в этом вопросе!
I don't have a degree in economics, if that's what you mean. I am a physicist.
There are some examples (and logic) that I base this observation on.
1. It is clear that many low-tech jobs were sent overseas (if you have a credit card you might have noticed that if you call their information call center, you'd be transferred to one in India, if you buy a TV you might notice that it is assembled in Malaysia, etc). Low-skilled jobs are moving from the US overseas - and there is nothing that govt can do to stop it. C'est la vie.
2. With low-skilled jobs gone the population must be getting other jobs -- either in service industry or in high(er) tech industry. Or get on govt support -- and noone wants it.
3. Service jobs are limited -- and people who take them do not generate new workplaces.