Alright, out of the top 10 rice producing states in India 3 are from the South and there are just 5 states in Southern India. While AP produces 130 lank tonnes, UP produces 140L tons and look at the difference in population. Regarding your statement about automobile companies in the South, they are private firms and it is upto them to decide where they want to put up their facilities. You can see private firms across Western, Central and Southern India but not along the ganges belt states because they are aware of the high crime rate, uneducated population who also lack basic civic sense and no wonder no company wants to set up shop in those regions. But, GoI is still allocating you higher paltry based on the taxes you contribute and offering you higher incentives, PSU's and other such govt stuff which is exactly my point that paltry should be offered based on what you contribute which is the only way govt of a particular state could strive for development.
Regarding your statement that UP would be the 5th largest country by population, of-course it would be when they breed like insects and pull their cocks out whenever they see a female organism and most of them happen to be living under the poverty line, so no wonder I wouldn't care what their population is as they aren't the most attractive market and regarding the communal violence and caste-based politics - don't even get me started on that