I would think that an employer could find another employee pretty quickly particularly in this job market where people are losing jobs because of the current economic climate. I understand the frustration in having to train another person and taking a punt on someone new.

Whereas an employee who is terminated may find it much more difficult to find another job.

Nothing in life is ever perfectly equal, sometimes there are good reasons for this, other times I guess it might be a case of choosing one side over the other. Without some rules in employment, workers would really be up a creek without a paddle.

I agree that a week's notice is probably not enough time to give to an employer, I am not sure what would be fair given that another employer is waiting for the person to start the new job as well. There may be contingencies if the person cannot start the new job within a period of time they lose the position. But I get your point.