Sure, but remember that Verisign manages a total of 179 million domains. They also have less than 1,000 employees. Can they really have a salary cost of >$530K per employee? It's obviously the executive team that pockets most of that cost.
Obviously is not aware of the bonus system in America.
Welcome to the wonderful world of corporate overhead and inefficiencies.
...$530K cost to employ is actually not unheard of for a US based software company, actually. (i.e. including office space, equipment, healthcare, benfits and corporate taxes). Maybe slightly on the high side though.
Fyi overhead often add anything up to 100% to the basic salary cost. Office space, hiring, travel, various forms of insurance, these things add up.
And serving DNS for the root or a big zone is technically challenging. You want 100% uptime despite DDoS attacks, that's not simple.