Wrong.
The taxes are paid by people who pay for a NV hotel/resort room.
And major sports stadiums often don't pay for themselves during their useful life. Case in point the Seattle Kingdome, which still had about 25% of its mortgage balance unpaid when it was razed.
Not saying there aren't economic benefits to civic projects like this that are hard to measure and hard to sell to a populace that probably won't think the whole thing through, but that doesn't relieve the government of the responsibility to honestly account for how they are being paid for, especially since the benefits will lag behind the costs several years.
Thats the thing everyone misses, most of the tax money collected here in Las Vegas are paid by people from other states and countries who come here to party. My state and local taxes are a pittance. No income taxes, very low property tax...and pretty high sales taxes (except none on food, most sales taxes collected are also from visitors). As a local, Im paying very little overall in taxes...and hardly anything at all for this stadium deal.