Problem with “sales led” businesses in a service industry (I have experience of both software and design) is that a stiff targets and rewards system nearly always leads to ‘bad’ jobs being taken on.
The actual doers are left with a PITA client (the sort that has screwed the sales guy down beyond all common sense) and a budget where you’ve no hope in making it profitable.
Leads to very bad blood (doers are ungrateful bastards, sales guys are the ignorant cocks effectively selling your soul at a cut price), and as a few have mentioned, it eventually buckles under itself as the bad but ‘successful’ sales guys move on before they’re caught and the production team usually walks.
Only places I’ve worked where there’s been any degree of longterm success coupled with actual harmony and wellbeing in the work place is when there’s no segregation of sales and production…