They do have GFCI breakers. I'm not sure how they compare in cost, but one disadvantage is that you can't easily test them (who ever bothers going to their bre

They do have GFCI breakers. I'm not sure how they compare in cost, but one disadvantage is that you can't easily test them (who ever bothers going to their breaker box to test the GFCI occasionally?), nor can you easily reset them when they do trip.