Go Begging Meaning

(idiomatic) To be available but wasted, unused, or not actualized.

Example: 1904, David Graham Phillips, The Cost, ch. 18:
  "Principles without leaders go begging," he replied.
1957 April 8, "They're Either Too Pretty or Too Old," Time:
  As prosperity piles up the paperwork, the shortage becomes more severe; some 250000 secretarial jobs go begging every day.
2011 June 28, Piers Newbery, “Wimbledon 2011: Sabine Lisicki beats Marion Bartoli”[1], BBC Sport:
  Three match points went begging as that potent first serve deserted her and even a magnificent backhand lob could not stop Bartoli making it 5-5, before going on to level the match in the tie-break.