Except crucially the pay isn't very good for tellers, whereas it's better for proper bankers / branch managers / etc. I think "does the job pay well" and "is it not manual labor" are both more important aspects of what white collar means than literally what you're wearing to do the job. I'm a FANG SWE and we mostly dress like slobs, but it's absolutely white collar despite the literal attire because it's a highly paid job in an office environment.

Pay is clearly irrelevant. White/blue collar is not defined by pay. Certain tradesmen are earning as much as SWEs – sometimes even more – but are considered blue collar by most. Again, it is about the environment in which the work is done.

Office environment is key to what you say. That is why you would be considered white collar. The literal white collars may be gone, but what you call "dressing like slobs" is just a modern adaptation of the same white collar idea.

Now, as it pertains to tellers, banks are typically considered to be an office environment, thus why most consider them to be white collar.

> thus why most consider them to be white collar

You've claimed this twice, but I would guess that almost no one thinks a bank teller is white collar.

Sure they work in an office environment, but their role is more similar to the cleaning crew than to the branch manager.

Nothing about the day-to-day work in terms of autonomy, education, responsibility or any other key intangibles of the job match "white collar". It's akin to being a secretary or a mailman or working in a call center.

You'd guess wrong. We have record keeping around how most people use words, and according to those records "white collar" is used in this fashion of: "relating to the work done or those who work in an office or other professional environment."

And you confirm that they work in an office environment, so that bit isn't in question. Perhaps you are confusing most with all? It is certain that not everyone sees "white collar" that way, but we're not talking about everyone.