Do Right
7 He then said to the crowds who came out to be baptized by him, “Brood of vipers! Who warned you to flee from the coming wrath? 8 Therefore produce fruit consistent with repentance. And don’t start saying to yourselves, ‘We have Abraham as our father,’ for I tell you that God is able to raise up children for Abraham from these stones! 9 Even now the ax is ready to strike the root of the trees! Therefore, every tree that doesn’t produce good fruit will be cut down and thrown into the fire.”
10 “What then should we do?” the crowds were asking him. 11 He replied to them, “The one who has two shirts must share with someone who has none, and the one who has food must do the same.” 12 Tax collectors also came to be baptized, and they asked him, “Teacher, what should we do?” 13 He told them, “Don’t collect any more than what you have been authorized.” 14 Some soldiers also questioned him: “What should we do?” He said to them, “Don’t take money from anyone by force or false accusation; be satisfied with your wages.”
Luke 3:7-14 HCSB
John the Baptist wasn't afraid to confront people about their sins. After telling the crowds to produce fruit consistent with repentance, three groups asked what that meant for them. In each case he basically told them to do right by other people; specifically as it relates to giving to the needy and not taking advantage of people financially. And notice that John chooses to use examples tied to money and possessions, when explaining fruit consistent with repentance.