or time-zone management.

Look, if the management did have to hire overseas and the management were to be located many time zones away, then your points would be very valid.

But, a lot of management is located where the shops or employees are situated. Most, if not all, of that foreign labor is being managed locally, and oftentimes, the hiring of management is from local talent, or the talent is from home and has either moved to where the shops are or make frequent visits to supervise operations.

The ideal situation is to always have operations and management located together, but, with offshoring, it's not going to be possible. The best that can be done is to hire local management, or to hire management at home and then have them relocated to where the shops are, or to have management do frequent "supervisory" visits. Those are all happening, and, where it doesn't work, management will pull the plug, and in fact, that's already happened with a lot of companies.

The bottom line is that, most corporations have already determined that, it's more fruitful to send shops and jobs overseas, than to have production done at home, even with the time-zone problems.