His is likely the weathiest person running for mayor which means he shouldn't be the last person to file his income with the State. He can hire more accountants then the rest combined, so I don't think he can claim delays with much credibility. It is reasonable for a candidate to not want to appear rich, but you look worse when you get caught trying to deflect attention from that fact.
Also in this story we learn that Sandra Queen Noble may be suffering from a "mental injury." The WCET debate left no doubt in my mind.