The dearth of actual physical human tellers in bank branches.
Went to a branch this morning to deposit ~ $150 of coins which had accumulated over the last few years. Last time I went to this particular branch there was a rack of tellers; not anymore. The job would have taken 2 minutes with a human in the loop. Not anymore. A human might have done all the coins in a single transaction; the ATM barfs once a certain number of coins is added, requiring multiple transactions. More disturbingly, a human could doublecheck when over $100 of coins, including a couple of bags of gold coins, is tallied as $35.
Transaction cancelled, left the bank with a bag full of loose coins, no longer sorted into their respective denominations. Spent ten minutes to achieve nothing, tying up the time of the sole human "attendant", while a queue of punters grew ever longer and grumpier behind me.
This particular bank just posted a 7 billion dollar profit - would it really hurt the bottom line to spend some of that on a few menials to staff the branches?
Oh well. Tonight for giggles I might order a stack of pizzas and pay for them with 5 and 10 cent pieces...