I don't agree with the people bashing stockholders. If you're not too rich to care about your STI, why would stockholders be too rich to care about how much their stock is worth? I own funds (probably most people do) with AIG as part of the market basket, even if I don't own stock directly (I wouldn't advise any employee to voluntarily buy stock- that is pretty much the opposite of diversification of risk; now your job and your assets both depend on the same company).
In most companies, when the company doesn't do well, the STI is not fully funded. Last company I worked for, though doing much better than AIG, had many years when the STI was at 90% or 85%. You could perform really well and get a multiplier of higher than one on your salary, but that was applied along with the low multiplier based on how the company performed.
It seems disingenuous to say that STI is an almost guaranteed part of your income. There's a reason why it's split out, and that reason is because it depends on the company making money. I think that's pretty fair.
Think that @VOSdZq5-5bud made a good point. Nothing should be taken for granted