Why do we wait for our order in a Drive Thru

Why must I wait in a drive thru for my order when firstly a drive should be a speedy service, secondly we can't wait in store for the order as we have a deadline to get too.<br> <br> This brings me to the absolute pathetic service I received whilst using the Observatory KFC drive thru. When i got to the order counter i was not even greeted by the attendant on duty, I asked to for a deluxe burger. she proceeds to process my payment on my debit card hands me the machine for my pin and then just disappears. I am left holding the machine. Eventually she returns and completes the transaction. Then i round the bend in the drive thru only to now have to wait for almost 20 minutes because 3 cars in front of the me the order was wrongly placed. Once again if the tenant at the transaction counter was a bit more polite and actually listened to the customer in the first place then the delay would not have been a problem. When i eventually got to the the checkout counter the order was handed to me not even with a thank you or enjoy your day. Its like i am doing them a service by using the drive thru.<br> <br> Pathetic pathetic pathetic. Cashier was was Thabela<br> Invoice Number : IN0100T***<br>