Because large, quoted research agencies must constantly deliver better and better returns to their shareholders there is a strong temptation to try and get away with staffing projects with the least experienced (i.e. cheapest) staff member possible.
FlyResearch is privately held and our firm policy is to plump for experience. This pays dividends in the design phase of a research project and especially in the analysis phase when it's important to have someone who's been around the block a few times adding insight to the raw data.