My definition of integrity is: Doing the right thing when no one is watching.
Wealthy, successful people forge such powerfully strong relationships with other like-minded, successful people because they understand the power of integrity. When you have integrity you build a trust bank account that you can withdraw from when opportunities or a need arises. When your important relationships know you have integrity they trust you and will lend you money, invest with you, refer you business, help you or a family member find a job and open up doors for you. They will invest in their relationship with you because you have integrity and they trust you. Those who lack integrity regularly damage their relationships and are constantly in pursuit of new relationships to replace the old, damaged ones. Eventually the word gets around and successful people will avoid anyone with a bad reputation like the plague. Those who lack integrity never get far in life. They struggle financially. Many eventually go bankrupt, destroying even more relationships in the process.
If you want to realize true success in life make a Rich Habit out of doing the right thing every time, when no one is watching.