Let it not be forgotten that age old temples have done good to all impartially. These are conceptions, gifts of the Noble hearted elderly (Kings etc top men/women). They have consciously constructed temples & then left behind lands, properties etc. The latter ones have even left behind wills to take care of the temples' survival.
Some of the noble hearted remained bachelors, spinsters, widows, widowers, issueless etc all through. Society did them good in particular ways & the Noble hearted have desired to return the good in particular ways. The law, ways & means have all changed over the ages. Some have left behind wills & some do not, but have trained people. They have donated their land, movables & immovables etc & hope that the pooja be done in a particular way. They have also specified the criteria for people's appointment, the job they need to do; investments, dates etc for food distribution, tank renovation, farming etc etc. They have also given quiet a bit to the animal kingdom. Some of the temples have been operating on those percepts since ages & they may not have written documents. Some of the older temples do not have documents, but have been operating since generations by word of mouth. So, some practices have through such means.
I see that this has happened even in other religions. The lands were occupied by different rulers. All religions have had noble hearted & all such places have been, are operating on the percepts that were laid. This issue thus involves emotions, respecting those wills (Written & Oral) & may please not be hurried through the way it is now.