Laugh All The Way To The Bank Meaning

Example : 1994, Taki, Nothing to Declare: A Memoir, ISBN 9780871134844, p. 212 (Google books view):  Ivan Boesky laughed all the way to the bank, as did Milken, as do most people who commit clever, non-violent crimes and fraudulently enrich themselves.2009 Sep. 16, "Twitter's Popularity: Users Love Stupid Content," Newsweek (retrieved 13 April 2015):  Who cares if he's not funny? The venture capitalists behind Twitter will be laughing all the way to the bank.2010, Hal Erickson, "The Wolf of Wall Street (1929)," New York Times: Movies (retrieved 13 April 2015):  George Bancroft stars as ruthless stock manipulator Jim Bradford, who plays his customers for suckers and laughs all the way to the bank.