I think Critias answer is as close to a final answer. Its is so dependent on the players, their characters motivations etc. So a definent answer is not possible (and the debate to determine it thus pointless and likely to end in tears..)
So runners will do jobs for revenge, to earn favours, in trade for info or rare gear... A raw nuyen value per a run doesn't capture all scenarios. Then you have up front partial payment, expemnse accounts, gear supplied, gear or data looted, and more... Whew!
The ten grand amount may be a good starting point, but feel free to find your own path that works for you and the players.