I brought this point up before:

All taxes and surcharges should be included in the price, especially the advertised price. If after renting a car, the actual taxes were found to be less than the anticipated rate, the company can then deduct the difference from the final bill. It is our government that allows companies to mislead us with rates that do not include taxes.

I also think that the taxes on auto rentals/hotels/etc are nothing more than taxation without representation since a traveler has no vote in the tax bill that allows the government to collect the tax.

One final thought: Charges for items like ad-volorem recovery fee....I can't believe this is legal to charge.