You gave a comparison between the success rates of files handled by consultants and lawyers, respectively, depending on the country. You have obviously made a scientific effort to try to isolate the variable as far as possible.
Did you take into account the impact that the type of client has on the success rate? In other words, is the difference really attributable to the type of professional representing the applicant or to the fact that clients dealing with consultants may have more difficult files than those dealing with lawyers?