karachi collects revenue not generates . and in last nfc awards sindh tried to make it on collection base while punjab insisted on revenue generation
Tarin unveiled that two positions-revenue collection and revenue generation- have been selected, The Punjab wanted revenue generation, while Sindh insisted for revenue collection for fourth criteria of resource distribution among the provinces,
NFC decides criteria for horizontal resource distribution | The Nation
this clearly indicates punjab generates major chunk of revenue in pakistan while sindh collects revenue on bases on head quarters of banks and other firms and port operations