If negotiations between the City and the unions don't address the DIA collection as a possible new revenue source -- either through outright sales of artworks or through a cultural endowment generating capital income -- would a bad faith exception let the unions retract their concessions after the fact? The City ought to reduce its bankruptcy risks by actually using its assets to generate revenues rather than pretending that it doesn't own them and can't afford to meet its contractual obligations. Concessions obtained under bad faith could really blow up in the City's face, and leave it with the worst of all possible outcomes -- the DIA stripped nearly bare to meet all the obligations accelerated by bankruptcy. Raising money more deliberately ought to bring in plenty of cash so that they City can pay its obligations as they come due by contract.