I just want to add that the main issue with retaining inspectors is the amount of travel leading to unfavorable work-life balance. Most people do not want to travel 75% of their working time. I imagine the number of people wanting to travel to or relocate to India and China is smaller than those willing to travel or relocate domestically. Then you need qualified people interested in this domain. I image the pool of ideal candidates is extremely small. Recent vacancies are about 10-15%.