Yes, compared to the situation 15 or 20 years ago zoos are enjoying a very succesful period. To think that London almost closed down in the early 1990s, and now look at how much money it's spending!
I was over there at that time and the Britsh goverment gave LZS 10 millon pounds to help up grade the zoo, as it turned out the top brass were reported to have wasted most of it, as some of the reports at the time said a lot of the money went on flash cars for the brass at the time and other top level spendings with little for exhibits.