I suspect it's more a class thing than a nationality thing. Pro cycling is traditionally a poorly paid, working-class sport (like football used to be). Fairness is perhaps less important a consideration to many pro cyclists of the past, and even the present in some countries, than being able to support your family. It's relatively easy for an outsider like David Millar (middle-class Brit) to take a different position.
According to the recent biography of Reg Harris (very much a working-class hero), he was entirely "continental" in his attitudes towards fairness in cycling.
Love that Robert Millar piece. Maybe all pro cycling needs to cure its ills is more Scottish riders named Millar.
d.