Why stop with the clocks?
Today I announce my genius proposal Wallet Saving Prices.
Everyone wants more money left over after they buy something, so the obvious way to achieve that is just slide all the numbering systems left by one.
Henceforth all prices shall be written on a scale that starts at -1 instead of 0. If a thing cost $4 yesterday, it now costs the same 4 dollars, but the price is written as $3. This will give everyone more money!