Cashless Cabin? Legal?
While I'm not a frequent purchaser of in-flight products, one dumb question has bugged me for a while (my apologies if it has been asked before).
How can Delta legally have a 'Cashless cabin'?
If I request a beverage / snack and provide cash (USD), don't they by law have to accept the cash as compensation for this transaction?
My reasoning for this is that it explicitly states on every US Dollar Bill...
"This note is legal tender for all debts, public, and private"
One could make an arguement on international flights that this does not apply, but I think for domestic flights it should.
I know it's a very dumb question, but am I off base?