How is screwing them up with a corporation any different than doing so with a stack of guys or a spy? Or a diplomatic overture to a rival of theirs causing them to attack?
Isn't that the point of the game, to use what you have to both further yourself and then drag down the other guy also?
The difference my friend is that with a spy, you pay 4000EP (which is equivalent to gold) PER espionage mission that is effective, or 300EP per low espionage mission.
This mission effects only 1 city, and it effects it for 8 turns (whilst the big espionage missions can be something along the lines of stealing techs).
But for 1500

Something just doesn't seem right does it? It seems like "Espionage Version3 - The return of the super espionage"