Whose idea/hope was that it would work that way? Because Magnus could have easily put something to enforce that into the Articles, but deliberately did not.
Keep in mind Magnus the Pious does not have secret mind control powers. The reason the articles work is in no small measure because they reasonable things so that the wizards police each other. I mean imagine all the tricks we have used to get around the letter of the Vow of Poverty, now imagine the creativity of every wizard from every college bent upon it... and BTW your superiors are in on it because it is blatant anti-wizard discrimination. The system would break down, likely explosively.