Colonial Americans launched a Revolution over a 2% tax on Tea.
Now the top marginal income tax rate is 39.6% plus State and Local taxes that can be as high as 10%.
But it all depends on what you get for your taxes. If all the basic services that a government should offer suck, any tax is going to seem unfair. I'm sure that stuff like law enforcement and fire services weren't that good in the colonial era.
As for the Model S as a luxury car, I agree with ozweepay. If you look at European-spec VWs Passats and Opel Insignias (which are mass-market mainstream sedans), you're going to find interiors that (to me) feel slightly more well put together and with a higher grade of materials than the TMS. The TMS is expensive due to the same reasons that early computers and mobile phones cost an arm and a leg.