This is even worse that the current system as it essentially means flat tax regardless of your income. This means a poor person is paying the same income tax through purchasing items at a store who will be on the hook for the taxes so naturally will pass on to you and at the same time a rich person will pay the same price and tax. Further since it is centralized all the same issues of corruption and exploitation exist even if the intent today is good.

What is decentralized?

Is Taler decentralized?