There is a little story, very interesting. So one poor boy, he was student in a school, and the teacher's annual ceremony of father's death would be held. So he requested all his student, "What you will give me, contribution?" Formerly the teacher was not taking any salary. But whatever he wanted, the students will bring either from parents' house or by begging. That was the system. The teacher would not charge anything. A brahmana cannot be..., charge anything. Generally, the brahmanas were teachers. That is one of the profession of the brahmana. Everyone must have livelihood. So brahmana livelihood is pathana pathana. He must become a learned scholar, and he will make others also learned scholar. That is brahmana's business. Pathana pathana yajana yajana dana pratigrahah. Sat-karma. Six kinds of profession for the brahmanas. And ksatriya's profession is to give protection to the citizen and levy some tax, twenty-five percent, not more than that. Whatever is income your, give twenty-five percent to the ksatriya king. That's all. That includes sales tax, this tax, that tax, so many tax, income tax. All finished. You give twenty-five percent. And if you have no income, no tax. Not like that even you have no income, "No, last year you gave so much tax. You must give it. Otherwise your property will be sold." Not like that. So that is ksatriya's income. Similarly, vaisya's income, krsi-go-raksya-vanijyam [Bg. 18.44], agriculture, cow protection, and if there is excess foodstuff, then he can sell, make trade. And sudras, they will simply help.   (More...)