“The City of Chicago is in significantly worse financial shape than it might first appear, and its taxpayers face the highest taxpayer burden in the country,” the Chicago-based non-profit said in a report made public Tuesday and entitled “Taxpayers on the Hook.” The new TIA report updates one released earlier this year that found Chicago ranked second to New York City among the nation’s 10 most populated cities for the unfunded tax burden it imposes on local taxpayers.