Or just reduce the amount of gold everyone has by a certain percent, along with the rewards and costs of everything in game., But... Effort
I like the idea but I don't think you can just move a decimal across. The devs will have to do math. And I'm not sure if they are very good at it :/
I think we should move 3 or 4 decimal places and get rid of the first 1 or 2 tiers as they are practically skipped. Volleys get players straight to T3.