Hyd may have grown under telgu desams rule but villages saw zero development. The present congress rule is corrupt but its doing much more for agriculture and overall state's growth than the previous government.
Also it's not true that one person or a leader is responsible.There is lot of potential here in the number of engineering graduates(more than 100,000 a year) and hence the companies used their services.The government is just a mediator and a facilitator. Ultimately,the change or progress is brought about by the people.