You are comparing apples with oranges and extending your line of argument, implies stewards at any race cannot be from any of the following countries:Calling the race stewards "clerks" is ridiculous. Thats exactly like giving an Italian soccer referee to be in charge of a world cup match, say, between Italy and Brazil. Isnt he just a "clerk" of FIFA? Why then FIFA doesnt follow this ridiculous idea?!
UK, Spain, Brazil, Columbia, France, US, Germany, Canada, Australia, Austria, Holland, Italy, Japan, Portugal. In short most (if not all) of the countries with any motor sport history or experience.