A large rally is planned for Wednesday in New York City, with backing from union groups.
More than 700 protesters were arrested on Saturday on Brooklyn Bridge.
The demonstrations - based at Zuccotti Park, near Wall Street and the Federal Reserve - are now entering their third week.
Answering questions during a news conference at UN headquarters on Monday, Mr Soros said: "The decision not to inject capital into the banks, but to effectively relieve them of their bad assets and then allow them to earn their way out of a hole leaves the banks bumper profits and then allows them to pay bumper bonuses."
I had to laugh at some conservative talking heads trying to marginalize the ramblings and incoherence of some of the demonstrators on Wall Street. The conservative pundits have no clue. Water will find its level and water is rising fast. The meaning of the demonstrations will fast become clear. People have had it. They and we all know the system does not work. It is broken. Fixed. Fucked up FUBAR, Beyond all Recognition. They all suck. All of them. The Courts, The Congress, The President, Wall Street, The Banks, The Chinese, all of them.
"Protests continued on Monday in New York, with many under the Occupy Wall Street banner wearing make-up to pose as "corporate zombies", eating fake money.
One of the protesters, John Hildebrand, 24, an unemployed teacher from the US state of Oklahoma, told the Associated Press news agency: "My issue is corporate influence in politics. I would like to eliminate corporate financing from politics."
Union members are expected to back a large rally planned for Wednesday."
Last Thursday, the United Federation of Teachers and the Transport Workers Union, which has 38,000 members, pledged support for the protests.
In Los Angeles on Monday, an anti-Wall Street demonstration was held outside the court where Michael Jackson's doctor is being tried for manslaughter.
Protests were held in recent days in Boston, Los Angeles and Chicago in front of their respective cities' Federal Reserve buildings. A march was also held in Columbus, Ohio.