For the same reason a real estate agent wants to get a deal done. After a while negotiating for an extra few thousand gets the recrutor an extra few hundred.

For the same reason a real estate agent wants to get a deal done. After a while negotiating for an extra few thousand gets the recrutor an extra few hundred. If it takes 2 days to get this much more then the recruiter has lost money. However to the employee, this takes none of his/her time and compounds onto top of each additional raise so it's in their interest to get the most they can no matter how much time, with in reason, it takes the recruiter to get the deal done.