I think that some of the biggest wastes of money occur when a zoo says it needs so many millions of pounds to develop an exhibit for a popular species. The zoo often plays the guilt card by implying that the exhibit will save the species from extinction, indicating that if visitors don't pay towards the exhibit, they don't care about the species. What is not said is that the species is already abundant in captivity and the exhibit is aimed more towards increasing profits, some of which can go to boost the pay of officials, than towards conservation. The architects and construction workers can take advantage of the large amounts of money available and, as far as the zoo officials are concerned, it doesn't really matter how successful the exhibit; other people have paid for it. I have worked in the public sector and have seen the same tactics employed. "If it costs £7 million and there are 70 million people in the UK, it's only 10p each, so it doesn't matter how the money is spent."