If you're doing business travel you can probably justify 50€ fairly easily.

$50 after walking off a $1200 flight, $60 upgrade to board early, and $12 in cocktails is not a substantial amount. Plus lunch/dinner on the way to/at the airport for $40. And you're gonna pay $8-12 to get downtown via public transit, then make a transfer to a bus and walk two blocks to your hotel. Fifty bucks for a taxi is a lot, but a rounding error on a transatlantic flight/trip, and will drop you off in front of the hotel, might even carry your bags into the lobby for you, or at least load them onto a luggage cart.

Your reasoning makes absolutely no sense. Either you have the budget for luxury, or you don't.

If you have the budget to eat at the airport, drink cocktails and pay for early boarding, then you're most likely loaded.

If you're not rich, but still pay for convenience services like that, I'd say you have irrational spending behavior.

You think you are rich if you have a spare 50$ ?

wow

Then I must be mega-rich.

by 'spare' I think he/she meant something like "ah, whatever, I don't care"

'not spare' would be: "50€ ? I could buy xy for that!"