A sole proprietor landscaper making $45-50K a year in California is paying $675 a year in annual registration fees just to keep his newish pickup truck on the road. Why newish? Because the people he's servicing trust a guy with a nicer work vehicle than a beaten down 30 year old Tacoma.
A $900k developer with the same pickup is also paying $675 a year.
Extrapolate this seemingly trivial example across literally EVERYTHING in life.
We do not have marginal sales tax rates because it is not feasible.
Marginal income tax is feasible, and so it does exist in most places.
Marginal property/wealth tax is somewhere in the middle, given the difficulties in valuing thinly traded assets, and the tremendous effort required to appraise them all the time, over and over.