Take Finland, for example, with open list proportional elections. The primary competitors of every candidate are other candidates from the same party and district. In order to win, you have to develop and maintain your own niche. Many politicians leave to become lobbyists or consultants or join a think tank, but it's almost always a one-way street. It's difficult to return to politics after an extended absence, because someone else has already taken your niche (if it's still viable), and money and experience rarely help win it back.
As for the actual question, many European countries seem to consider trade secrets primarily a contractual matter. Revealing private secrets is not a crime, while abusing your position or breaking into a system without proper authorization can be. Prosecutors generally cannot invoke national security without a clear legal basis. Which probably can't be found in matters that are more about Western competitiveness in general than about the security and interests of a specific country.
