Well, it was going to go up by $4,000. Now it's only going up $1,500
So it's going down by the amount it's not going up, and what you're getting by not extra spending is worth even more than $2500 because of the universal good you're doing by contributing to allowing others to save big by not spending even bigger when they have $2500 savings on their $4000 increase as well.
See? It all makes sense.