It is nothing more than unfettered greed and selfishness.
James 5:1-8
“Come now, you rich, weep and howl for the miseries that are coming upon you. Your riches have rotted and your garments are moth-eaten. Your gold and silver have corroded, and their corrosion will be evidence against you and will eat your flesh like fire. You have laid up treasure in the last days. Behold, the wages of the laborers who mowed your fields, which you kept back by fraud, are crying out against you, and the cries of the harvesters have reached the ears of the Lord of hosts. You have lived on the earth in luxury and in self-indulgence. You have fattened your hearts in a day of slaughter. You have condemned and murdered the righteous person. He does not resist you.”
There are those who will try to explain away the statement, by saying it applies only to those who do not pay their workers. Funny how Christ stated we cannot worship two masters, God and Mammon. But for some reason we always seem to be able to ignore this.