You cannot serve God and mammon
When man refuses to worship God, he immediately begins to worship idols. And perhaps the most important of all those idols is the god Mammon, the one that embodies the riches and things of this world.
And idolatry, like any other sin (though most especially this particular sin) evokes the most dreadful contempt for the simple reason that idolatry somehow demands that the worshiper kneel before the idol. And when the idol is the subject of absolute worship, as happens in certain cults, its worshiping also includes kneeling until one’s head touches the ground; which requires in the worshiper what some well-intentioned observer would describe as a predisposition to showing one’s backside and what other ill-intentioned bystanders might consider as a pose in which it is necessary to raise one’s rear end.