From the vantage point of saloons and sporting houses, where Chicago's criminal elite hangs out, Jurgis begins to understand how rotten the municipal government is. Summarize the nature of the corruption that spans the elite and the common man alike.

From the text:

"Duane took Jurgis out and introduced him to the saloons and "sporting houses" where the big crooks and "holdup men" hung out.

And so Jurgis got a glimpse of the high-class criminal world of Chicago. The city, which was owned by an oligarchy of businessmen, being nominally ruled by the people, a huge army of graft was necessary for the purpose of effecting the transfer of power. Twice a year, in the spring and fall elections, millions of dollars were furnished by the businessmen and expended by this army; meetings were held and clever speakers were hired, bands played and rockets sizzled, tons of documents and reservoirs of drinks were distributed, and tens of thousands of votes were bought for cash. And this army of graft had, of course, to be maintained the year round. The leaders and organizers were maintained by the businessmen directly--aldermen and legislators by means of bribes, party officials out of the campaign funds, lobbyists and corporation lawyers in the form of salaries, contractors by means of jobs, labor union leaders by subsidies, and newspaper proprietors and editors by advertisements. The rank and file, however, were either foisted upon the city, or else lived off the population directly. There was the police department, and the fire and water departments, and the whole balance of the civil list, from the meanest office boy to the head of a city department; and for the horde who could find no room in these, there was the world of vice and crime, there was license to seduce, to swindle and plunder and prey. The law forbade Sunday drinking; and this had delivered the saloon-keepers into the hands of the police, and made an alliance between them necessary. The law forbade prostitution; and this had brought the "madames" into the combination. It was the same with the gambling-house keeper and the poolroom man, and the same with any other man or woman who had a means of getting "graft," and was willing to pay over a share of it: the green-goods man and the highwayman, the pickpocket and the sneak thief, and the receiver of stolen goods, the seller of adulterated milk, of stale fruit and diseased meat, the proprietor of unsanitary tenements, the fake doctor and the usurer, the beggar and the "pushcart man," the prize fighter and the professional slugger, the race-track "tout," the procurer, the white-slave agent, and the expert seducer of young girls. All of these agencies of corruption were banded together, and leagued in blood brotherhood with the politician and the police; more often than not they were one and the same person,--the police captain would own the brothel he pretended to raid, the politician would open his headquarters in his saloon. "Hinkydink" or "Bathhouse John," or others of that ilk, were proprietors of the most notorious dives in Chicago, and also the "gray wolves" of the city council, who gave away the streets of the city to the businessmen; and those who patronized their places were the gamblers and prize fighters who set the law at defiance, and the burglars and holdup men who kept the whole city in terror. On election day all these powers of vice and crime were one power; they could tell within one per cent what the vote of their district would be, and they could change it at an hour's notice."