Philly Fed on Employment Growth 6-12 Months Out

Amongst those firms planning on increasing hiring over the medium term, the number one factor (by a very large margin) was the expected growth rate of sales. Similarly, for those firms not increasing hiring, the number one factor cited was sales growth (labour costs came in third). So the message is that sales growth (and not much else) will be critical for these firms hiring plans for 2011.
---ibid (My bold)