Egregious & consistent mistreatment of the horses.
The past four mayors have all tried to end the practice but the jockeys (drivers?) are part of a powerful transportation union.
If that's the reason, then the solution sounds like a typical bad bureaucratic government - instead of fixing the problem (improved treatment for horses), ban the whole thing.
If that's the reason, then the solution sounds like a typical bad bureaucratic government - instead of fixing the problem (improved treatment for horses), ban the whole thing.