The Wald test is a way of testing the significance of particular explanatory variables in a statistical model. (H. KyngaÈs and M. Rissanen).
Interesting publication by Văn Hà Le in which he argues that governments should offer higher wages to its employees in order to reduce the incentive for corruption. In economic theoretical terms it does make sense. Why would someone accept a bribe is his salary is already very high?
Or I can see two problems to this. First, the economic theoretical world does not always work in the real world. Despite having high salaries, I suspect a few people would still be inclined to accept a bribe. Its part of human nature as some philosophers would argue. This could be proven by the fact that corruption happens, albeit on a much lesser scale, in developed countries.
Secondly I suspect that it would be hard for politicians to justify such an increase in salaries based on the sole fact that it reduces corruption. Not all voters would buy that argument and first of all, corruption shouldn’t exist at all, shouldn’t it?