If I can find a new writer who will charge peanuts who I can guarantee will turn in a manuscript of Monte Cook's standard, then I've hit the jackpot. But with a new writer, you're dealing with an unknown quantity, and thus a risk.
Well, there's the question, then.
Is it, "Should I pay the 'usual gang of idiots' more money?". If that's the question, I - and I suspect, most here - are pretty unqualified to answer it (except maybe diehard LPJ fans).
Is it, "Should I hire a better gang of idiots?", we can discuss writing versus layout versus art, an interesting conversation that can go many ways.
Or is it, "If I up my freelance rate, do you think that would attract better writers, or produce better product?". Because this can be an interesting conversation, too - albeit, one I'm not really qualified for.
I've bought two LPJ products in the past, re-writes of the OGL sections of the Kingmaker adventure path. Rules were excellent, but that was Paizo; the writing was... ... ...let's go with "non-intuitive". But the material was interesting, and I'm probably willing to buy from them again.
So, if you're asking me, "Should I pay my writers more", I'd tend to say "No"*, sorry. If you're asking, "Should I try to get better writers", my answer is yes - but I'd answer that to every RPG company and every RPG book I've ever read**.
* - Note that I said above I was unqualified to give this answer. I stand by that statement.
** - Alright, not literally <every>. But certainly <most>.