Patriot86, while I agree with your general sentiment, the employment data isn't very indicative of anything unusual or unique. In most large cities and states when job data is aggregated the government winds up being the largest or one of the largest job providers. Whether or not the government is oversized and reasons for budget shortfalls is a separate issue from backdoor gun control.
“If we were to pursue a tax on something like guns and ammo, clearly that wouldn’t be popular with the [gun lobby] out there, and it may not generate $50 million, but ... it is consistent with our commitment to pursuing violence reduction in the city and in the county,” Kurt Summers, Preckwinkle’s chief of staff, said on Monday.
Even the people involved are acknowledging its not about the revenue but gun control, or violence reduction as they would put it. The monetary figures are just thrown out there as distraction and baseless justification.