Here's what I did: 2^7=128 ~ 100.

In my 6e Rifts campaign project, I plan to allow players to purchase equipment with either Character Points or with just money.

If a player buys Defenses as Powers, they effectively have Damage Negation -7 Physical DCs and -7 Energy DCs against Offensive Equipment bought with just money.
If a player buys Attacks as Powers, they effectively have Piercing (7) against Defensive Equipment bought with just money.

It's mostly a matter of special effect. A kevlar vest bought with points will be better than not acquired with points.