To replace consumption tax, which ensures those with large savings, yet no income, still get taxed as they spend, you'd have to somehow have full disclosure of all assets, and tax that, along with all the privacy implications.
And just imagine all the work, with every citizen's assets being examined yearly.
Of course, there are other options, but not many which replace consumption tax.
Additionally, not all consumption taxes are across-the-board sales taxes.
Across-the-board sales taxes are highly regressive taxes, because basic consumption needs are relatively flat across a population, so the poorest people pay a much higher percentage of their income in sales taxes than the wealthy.
Which makes it harder for people to know all the ins and outs of...
This is also the case in the US (varies state by state).
Here in Mexico we have something called the "canasta básica" (basic basket) which encompasses a set of goods that are defined as basic for living (they are 40 https://www.gob.mx/canastabasica unfortunately the list is in an image so not easy to google translate... stupid government pages). These are closely guarded by the government and I believe the price is closely protected.
Something like that could be extrapolated, and set different taxes to different goods and services. Like, (IMHO, please don't flame me) an XBOX should be heavily taxed, running shoes should be heavily taxed, a "gaming graphics card" should be heavily taxed. Same with services: "go cart racing" should be heavily taxed, Fast-food should be heavily taxed, while fixing stuff (fixing your blender, or your washing machine) should not.
For example, an unsliced bagel is food. A sliced to order bagel is prepared food and taxable. A system like you describe would be insanely complex.
Here’s NY guidance on when a sandwich is taxable: https://www.tax.ny.gov/pubs_and_bulls/tg_bulletins/st/sandwi...
As insane as that is, I think it makes the sales tax more progressive, as poorer people spend a high proportion of income on food. I am always struck when I travel to a place like South Carolina, where the property taxes are low, but people with nothing are paying 9% sales taxes on food.
Some places may also benefit from high property tax, which now that I think of it, is a "holding" tax, not income tax.