I have not researched this topic but my thinking is that it would not work very well. For example, in the US the DOT in conjunction with each state health department determines the guidelines for ambulances and training so that it is consistent. I'm not sure that other countries have similar agencies or guidelines. The care and treatment may not be standard or comparable. In third world countries where money may be scarce. Supplies and equipment may be more difficult to obtain. Medications may not be the same caliber since ours are regulated through the FDA. Globalizaation of training might be something to work towards.
Harold Letson
EMT-P, M Div