The cost of providing security training to your staff may be high, but what is the cost of not providing any training at all?
http://www.securityfocus.com/columnists/275

Has anyone ever quit a job mostly due to lack of training opportunities? I've been lucky in that both IT jobs I've had, the money has been there for training and certs but I've been lazy and not taken advantage so far.

Many of the jobs I have seen advertised have come to this. They want everything yet give you very little in return to help you continually improve your skill set.
....until something goes wrong and then there will be questions why no one was trained to handle it.