I feel Southern states have managed to infiltrate in Central Govt. Machinery to derive max. for their states. They are further helped by Regional Parties like AIDMK,DMK,TDP who have extracted max. by giving support to Coaliation Govt. At centre.
Southern Ministers in Central Govt. openly use their Power to Help their states. This is best shown by Present Health Min. Mr. Ambumani who Declared that A Medical Facility on Lines of AIIMS will be set up in South when other parts of india are also equally Crying. This is difficult to Digest because BMC hospitals in MUMBAI are Treating Patients from all parts of INDIA & Central Minister Mr. Ambumani never thought it fit to Help BMC Hospitals.
I recollect one story about Resolution in Madrad University for Granting First Class to max. Students because that is Pre-condition in any Prestigious Govt. Organisation like NPCIL,BARC.