There are an extremely high number of go-arounds in DXB compared to most airports I have worked. (Canada, for the curious.) Somewhere in the vicinity of 50 / month. I believe this may be to the following factors, and in no particular order:
1) Very stringent and inflexible separation standards between arrivals and departures. Not much room for controllers to apply judgment to 'make it work'.
2) Very stringent and inflexible standards as to how pilots fly the aircraft. Not much room for deviation from SOP's to 'make something work.'
All this is probably very good from a safety point of view, but it does come with associated costs. My two dirhams worth.