Having watched from the outside, you guys were getting more for less for decades before ACA got passed. Then, for a brief moment, things got better overall and the downward trend continued. Blaming the cause of the one blip where quality improved for some small portion of the population (estimated to be over 10 million) for the overall downward trend before and after sounds silly.
Tax it as part of registering your vehicle to an address within the congestion zone.