Sorry if this is a silly question but I just want to make sure there isn't going to be some kind of accounting issue down the road by doing this.
Seems like a win win for us since it works out cheaper overall by quite a bit. And it looks like there are a lot of people out there now willing to work for bitcoin.
The long answer: With some financial engineering it might be a good idea to pay outside contractors, but only with tight contracts. You need a portfolio of bitcoins and preferably some derivatives to hedge the risk inherent in that. You need to be able to buy bitcoin in forward.
You need to factor in the time it takes for the recipient to convert bitcoin to something usable in his currency (at least 7-14days) and add a premium to the payment covering the risk he is taking on. You can omit the latter but then the recipient is going to detract that premium from the price of the contract...