Why should death or gifts from grandparents to their grandchildren be taxable events? These people already paid taxes on that money when they first earned it, taxing it again at a person’s death is not only insulting, it's double-taxation.
The people who pay these taxes are the wealthiest in the country — they can afford it. Not to mention, the tax only applies to about 2 of every 1,000 estates. The government does not need to be giving the Paris Hiltons of the world a $269 billion gift.