You wish. Taxes are mostly proportional to the payer's income, or wealth, or to the value of some owned good. Instead, so called "tv licenses" are fixed, such that the poorest citizen, owner of a 10inch tv found in the trash bin, is bound to pay as much as the richest taxpayer, with his multi wall-sized home cinema devices.
In this respect it works exactly as the annual subscription to a TV service (it's actually called "subscription" in some countries) and it's clearly a remnant of the times when TVs were rare, expensive objects that were in themselves a proof of the wealth of their owners.