(Proverbs 15:6 KJV) In the house of the righteous is much treasure: but in the revenues of the wicked is trouble.
Here we are looking at how it is used, not just in how it is gathered. An evil person can earn money in a legal and ethical way then use it for perverted ends. Think of the closet alcoholic who works a job, maintains a public image and is walking a tightrope. How many people are there that are doing good things in public but feast on a gluttony of pornography when the doors are closed.
It would seem that the problem is not the money, but the heart and attitude. What people cannot see is the way that these cancers eat away in the secret areas. Sometimes the damage is hidden and explained away for a long time but the evil eventually does its work.
So? It is important to realize that God sees and knows all. It important for us to know it about our lives but it is also important for us to keep it in mind when we are trying to help others.