Well, leaving the sadhus wet dreams aside, finding gold in temple is quite plausible considering that kings of yester years used to consider temples (or other such places of religious significance) as their private treasuries and have been know to hide their stashes in such places. But the real question is whether the govt would be allowed to touch any of it. It would be quickly twisted into communal politics if the govt tries to take gold found in a temple.
Heck, Tirumala gets shit loads of anonymous donations (in form of currency and/or gold/jewelry) each of which may be in lakhs or crores. Most of it is black money from businessmen and politicians. Technically it should be seized by govt and can be put to good use. But that never happens.