I can't comment specifically on the issue as i don't have any data relevant for finance. in my department I've seen (by names) about 80% of the phd graduates get a tenured position within 2-3 years. many (about 50%) at top universities.... but i'm not in finance... so i don't really know
on the other side... I can understand the data that you brought.
psychologically - if you know that some people get 150k for tenure track, and you offered a tenure with 90k only... you'd probably think it is not a good offer. in finance, you could easily find a job in the industry for 150k. so you leave academia. but it is YOUR CHOICE. many would love to get a tenure for 90k. but because you know you COULD, THEORETICALLY, earn more - it affect your choices and judgement.
not many universities can afford paying an assist. prof. a starting salary of 150k. not even 120k. there are of course exceptions - but if you narrow down your options, don't complain the road is bumpy.
if you are really into research you'd settle for 90k tenure track. you'll have plenty of choice (because most competitors will prefer industry). do some research, wait 2-5 years, establish your reputation - and then get the good positions.