I don't think that it's correct to call Google corrupted, but I tend to believe that a corporation will sink as low as its' host government needs it to -- and the United States doesn't have too great a track record with regards to fair global politics and open/honest behavior.
In other words : When your government asks your business to play ball, you'll more often than not do so.
'Irish Google' is only a nice tax evasion -- Google itself is at the beck and call of the US -- if only for how hard it'd be to operate without their support.