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Don't risk it. Your pages will almost definitely be dropped as soon as the SEs notice the duplication, and you risk having your domain banned completely.
Most of the search engines place very little importance on the meta tags these days... mainly because putting a lot of importance on the keyword meta tag makes it way too easy to do things like you just described.
Edited by: mivox
Seriously, if you're in charge of SEO for your boss, make sure he understands how constantly the field changes, and knows you'll have to spend time on research to do an effective job... then spend all the time you can spare reading the threads in the SEO World forums!