That's taxable. In Britain at least, we have the VAT system where businesses must include it in their prices. There are two or three tiers with the highest tier of 20% applying to goods and services absolutely not necessary for day-to-day living.
Businesses are supposed to keep records of what they've charged and to whom, and they can use that proof to claim all or part of VAT back, so that the tax falls mostly on the consumer.
Businesses that don't do this generally get in trouble sooner rather than later.
(Now, I'm not going to claim VAT is perfect, nor that the stratification of it is done correctly as it stands, but it's proof a system like that can and does exist.)