Why Governmental Workers also Have to Go abroad?

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More and more people want to go abroad for academic advancement or business exchanges. So do the government leaders and middle-level governmental workers to improve their public services.

Some people, however, keep an critical eye in this problem, saying this is "a kind of making a tour on public money". Others say it is a kind of extra pay for their over-service. I don't agree with them because they fail to see the importance to be open and progressive in running governmental affairs by exchanging and learning experience from the outside world. "Seeing is believing" can be very useful for the governmental workers to improve their own work. And in many cases, it can even bring about a major change in their working style.?