Also, just because privilege exists doesn’t mean you shouldn’t use it if it does, for you; if the option is between the death of your startup or calling in some favors, the latter is the one you should take (assuming your bet in the startup is correct, but every founder tends to think it is, heh).
You’d be surprised how many in your circle have waaaaay less money than they let on, like orders of magnitude less.
If you get to know the person more, you can actually know/guess. Usually, it's a redflag that deviates from what their standard is. (ie: A big purchase, having significant instruments that are only accessible to privileged people, or struggling to pay a small a bill when they have an expensive car)
I just mean that even then, I knew some people who knew some people that had some money.