A Brahmana should live on alms, a Kshatriya should protect his subjects, a Vaishya should acquire wealth and a Shudra should serve all these other orders.
ब्राह्मणः प्रचरेद् भैक्षं क्षत्रिय: परिपालयेत्। वैश्यो धनार्जनं कुर्याच्छूद्रः परिचरेच्च तान्॥