The last paragraph needs to be corrected. TTD(Tirumala Tirupati Devasthanam) is a independent organisation and has nothing to do except appoint a Board and an Executive Officer (IAS Officer). The Government has no control over the funds or the day to day mangement of the temple. N T Rama Rao tried to take control with the funds and he failed. The same was with T Subbirami Reddy when he was the chairman of the Board tried to shift all the funds to ICICI Bank and he failed.
As far as the funds usage is concerned they are used to educational, medical and religious and charity.
The achariyas of the TTD are well paid and mostly they are heredietery.