Mencius - Book 3, Part 2, Chapter 4A

P'ang Kang asked Mencius, saying, 'Is it not an extravagant procedure to go from one prince to another and live upon them, followed by several tens of carriages, and attended by several hundred men?' Mencius replied, 'If there be not a proper ground for taking it, a single bamboo-cup of rice may not be received from a man. If there be such a proper ground, then Shun's receiving the kingdom from Yâo is not to be considered excessive. Do you think it was excessive?'

Kang said, 'No. But for a scholar performing no service to receive his support notwithstanding is improper.'

Mencius answered, 'If you do not have an intercommunication of the productions of labor, and an interchange of men's services, so that one from his overplus may supply the deficiency of another, then husbandmen will have a superfluity of grain, and women will have a superfluity of cloth. If you have such an interchange, carpenters and carriage-wrights may all get their food from you. Here now is a man, who, at home, is filial, and abroad, respectful to his elders; who watches over the principles of the ancient kings, awaiting the rise of future learners: and yet you will refuse to support him. How is it that you give honor to the carpenter and carriage-wright, and slight him who practices benevolence and righteousness?'
~ James Legge translation via nothingistic.org ~

Go here to read the introductory post to this serialized version of the Works of Mencius.