absence of ca in civil services qualified list

whenever upsc results are declared we happen to find engineers,doctors(this time a doctor was topper!),mba,lawyers.....................in list of succesful candidates but hardly a ca . are we incompetent with these professionals? surely no,bcoz in boardrooms CAs are known to easily outwit there counterparts like mba ,lawyers.

then still why are we lacking in this sphere ?are the subjects not scoring?or by the time student clears final exam he has exhausted all his studies stamina??????