Murder at the Savoy, by Per Wahloo and Maj Sjowall (1971)

Living "out in the Hills" has always been looked down upon by the Malmo bourgeoisie, but many Kirsberg residents were proud of their section and enjoyed living there, even though their homes not infrequently lacked modern conveniences or in general were below average, since no one bothered to maintain or repair them.  People who ended up in the poorest apartments either weren't wanted in the smarter residential areas or weren't considered to be in need of a higher standard of living.  It was no accident that many of the foreign factory workers who'd come to Malmo during recent years lived in this area.

--Wahloo and Sjowall, Murder at the Savoy, (Random House, 1971, translated by Amy and Ken Knoespel)

I recommend this sixth Martin Beck novel for those who are envious of Sweden's "safety net," which isn't always effective for foreigners who live there, or even for all Swedes. Beck and the understaffed police force are trying to figure out who murdered Viktor Palmgren, an industrialist who was involved in some very shady businesses and was murdered by a man who shot him during a lunch at the Savoy in Malmo and then left through the window.  Detective Martin Beck is sent from Stockholm to help solve the murder and gets nowhere; too many people hated Palmgren, even (or, especially) his wife.  They had no clues, not even what gun was used; someone who fit the killer's description took a ferry to Copenhagen but the police sent to meet the ferry stopped for lunch on the way and missed it.  Eventually the package that the man on the ferry had thrown overboard washed up on the beach and the family that found it brought it to the police, who were able to determine what pistol it had contained, an unusual make of target weapon which Beck was able to trace through gun clubs.  It turned out that one of the users of that make of gun had not only lost his job when Palmgren closed a factory, but also he had been evicted from an apartment building owned by Palmgren when, after losing his job, he couldn't pay the rent.  

Murder at the Savoy captures all the sleaziness of ruthless businessmen in Sweden, along with their "traveling secretaries" (prostitutes who go on business trips with them). Beck and his staff talk with many of Palmgren's associates in both legal and illegal businesses, as well as many people who suffer because of their Palmgren's greed; it's a grim and fascinating tour of one aspect of Swedish society.