Are you familiar with the term "progressive taxes"?
Consumption tax is the same for multimillionaires and for people who have 3 part time jobs and struggle to feed their family.
Then, imagine that you put a massive consumption tax for cards, for instance. What happens when the car of the 3 jobs guy is broken?
Also, how do you decide which products are the products that rich people buy and which are the products for "the poor"?