> Considering there sometimes are in the tech industry clauses in contract that prevent an employee from working in another company active in the same field for X years, could such a clause be applied to government employees ? To prevent that kind of abuse. Could that legally be done (in Canada, eg) and would that be `fair' ?

Especially considering that the pensions can be thought of as a form of "gardening leave"[1]

[1]: https://en.wikipedia.org/wiki/Garden_leave