But people with [mb]illions of funding just plopped money in a single account ..
Perhaps the slow depositors should be punished for not being sufficiently sophisticated, or as quick as the Thiel-backed startups that got the bat-signal to do a bank run. But the "moral" value of letting all those organizations lose their deposits is very low. The moral value of letting SVB fail, which it did, seems high to me!
The thing is that you don't need to be a financially sophisticated. Why are they making companies without talking to a CPA? They can get an account with PayChex and they will literally handle everything related with payroll. If your average mom and pop restaurant didn't do this we would fault them for being irresponsible.