Where does it say Dunmer don't pay taxes and don't work hard?
The Decree of Monument. They are untaxed and untithed; hence Ulfric has no responsibiility to protect them, nor do they owe any dues to Ulfric. The Gray Quarter is essentially a self-governing canton.
1 Owns/Works his own farm, 1 owns a business, 1 is a meat vendor, 1 works for the Nords at the docks, 1 is the nanny to a rich Nord family, and 2 work at the corner club. In fact they all seem to have jobs.
How can you claim that there's discrimination against the Dunmer yet in the same breath rattle off a list of them who've made it big? That farm owner employs a Nord; evidence, surely, that they're more equal than Ambarys (the owner of a business himself) cares to admit? And that's only Windhelm; what about the Dunmer businessmen, artisans, and officials in Winterhold and Riften?
Add in that the Nords still harass them and Ulfric according to Free-Winter won't lift a finger to help out the Dunmer or any other race besides Nord
He doesn't actually help the Nords either. Four young Nord women from prominent Nord families are murdered and he doesn't lift a finger. Nor does he retake Fort Amol or offer assistance to the East Empire Company in their quest to extirpate pirates. It's due to a lack of resources owing to the war, not racism.