The working class and the business class, both can fall under this category being preoccupied to acquire 'unrighteous mammon'. And at the same time the word clashes and is choked, thus believers become unfruitful in the obedience and will of GOD in Christ. But, still they are given a chance of redemption from above, to use one's 'unrighteous mammon' wisely. Based on two eternal homes that awaits all mankind, even believers, when after judgement is pronounced to them both.
Apostle Paul, as i've quoted his saying of the Lord prior, did mention believers should be content having cloth and food alone. And the rest of the purpose can be channeled for the word and for the every good works for the Kingdom of GOD (2Timothy3:16&17). Now another category of believers he also mentions, ones who do not work, being a busybody and dependent on the church for hand outs.
Apparently, what Paul was saying about them, is that they will not receive a hand out from the church if they are not going to work (2Thessalonians3:10-15). On the other hand not to generalize, there are also the poor who are unable to work
here. Even, orphans and widows alike, where the church should be the provider of their needs, especially believers' than unbelievers'.
As for Apostle John further, receiving hands out from unbelievers for the works of the church as to the Kingdom of GOD, is strictly prohibited (3John:verse 5-8).
i believe, we're almost clear about the saying of Jesus to His disciples, for instants using one's unrighteous mammon for the determination of one's eternal homes.