Manners, People, Manners

Are you nearly as tired as I am of having gum-chewing, mouth-breathing, disinterested cashiers who accept your money, (in the grocery store, that could be a considerable sum of money), and hand you your change without counting it out and your receipt with a "Here ya go" or a "Have a nice day/evening/night" without ever saying "Thank you"...
A pleasant greeting from me at the start of the transaction is sometimes returned with a
a. grunt
b. Hello
c. A blank stare
There will be no further communication with me (although the cashier's conversation with his/her bagger, or his/her counterpart at the next register, may continue without interruption) until it is time to announce to me the total showing on the register display...Actually, if I'm using my debit card, it won't even be necessary to announce said total...
At the very least, I would like to hear "Thanks"...It's only common courtesy...That single word says so much...It says, "I'm so glad you chose to shop in this store because I can keep my lame-ass minimum wage job a bit longer"...It says, "My Boss appreciates your business because he's afraid he'll lose HIS lame-ass job if it gets any slower"...It says, "My company gave me more than 12 minutes of training in how to treat a customer so they'll come back"...It says, "My Mother taught me to be polite and to say 'Please and Thank you'"...I have taken to saying, "You're welcome" at the end of the transaction, and sometimes it jogs that long-forgotten manners lesson and encourages a belated thank you...Other times, it is met with
a. A grunt
b. "What?"
c. A blank stare