A sales force amplifies what you are already doing. If a research company can hire a salesman that brings in $1M in additional sales, it makes sense to pay that salesman $900k in salary and benefits, because that's an additional $100k the company can put towards it's research. If you agree with the research, you should be happy they hired that salesman. Saying you agree with the mission of a company as long as it pays it's salesman less than $x doesn't make any sense, unless you somehow know that the salesman is bringing in less than $x.