Do you not factor in the risk of government tax policy changing when you make large financial decisions? I certainly do (for instance, when I choose between traditional and Roth contributions for my 401k, or when I was purchasing a new car a few years back), and it doesn't strike me as a particularly difficult thing to do; I think I may have even done so the last time I was hired for a job which offered options (although that was quite a while ago and my memory is hazy).
More to the point, however, I think if 2 years is insufficient notice to get your tax situation in order w/r/t employee stock options, either your finances are enough of a mess, or you're frankly just so stupid, that you would not be helped much more with 5 years, or even 10 years, of advance notice. And at that point, you (the poster, not the hypothetical hapless employee) are just arguing that the government should never change its tax policy, which is just absurd.
More to the point, however, I think if 2 years is insufficient notice to get your tax situation in order w/r/t employee stock options, either your finances are enough of a mess, or you're frankly just so stupid, that you would not be helped much more with 5 years, or even 10 years, of advance notice. And at that point, you (the poster, not the hypothetical hapless employee) are just arguing that the government should never change its tax policy, which is just absurd.