What city doesn't want the tax revenue generated by the registration of such a car?
That would depend on the region you are in. In the US for most regions
(states & counties), the registration costs are not much different whether you are registering a million dollar car or a $500 POS. In Texas it costs me about $50 to register what some would consider to be a relatively expensive car and if someone registered a Veyron, it would cost them about $50 as well.
Sales taxes are where you can pay a premium, but sales tax goes to the region where the car is sold or where the seller has it currently registered in. So if you bought a Veyron outside of that region and brought it in, it wouldn't financially benefit the region you brought it into. Of course, outside the US, there is no telling what kind of special tax laws might exist.
However, even if you bought the Veyron from a dealer or someone in the same region, or were in a region that forced you to pay special taxes, or even if they could receive the sales tax, you would have to live in a VERY low economical region where even a fee of about $200,000 would affect the economy so much as to make them look the other way.
As suggested, the type of person who would purchase a Veyron in the first place will likely have a great deal of political connections such that certain regional laws can and do get circumvented without too much trouble.