[Filthy_casual]

A jack of all trades isn't inherently better at all trades. There's great value to be found in a specialist.

And if you're hiring a front-end pay him as such. If you want him to know more than front-end beforehand, pay him extra.

[dmitrygr]

specialist != only know one thing

specialist = know one thing well, many things a little

only know one thing = useless one-time-use-tool whom i will contract for exactly my one-time-problem and then move on from