3. The 70% rule leads us astray because it fails to address the emotional
cost of losing 30% of our income. Most people focus on the 70% they
will keep, not the spending they will give up. They aren’t prepared for
the changes that will be required in their lifestyles. When they
eventually are confronted by the specifics they have to cut, they are
unhappy. In short, the 70% rule makes the future seem secure and
comfortable, even when it’s not.