suicide is never the right thing to do!
I put that somewhat harshly (also, let me point out that I was only referring to presidents, PMs and the like, to really major scandals, and to people who are actually guilty).
Obviously there are some good reasons why suicide is/may be not the right thing to do - such as concern for your family, especially if you have children.
I don't consider suicides to be morally reprehensible in any way, though. I believe it's within a person's rights.
And I do consider the behaviour of many disgraced politicians - not even to speak of corporate crooks - quite reprehensible.