Why is paying a multi-step process? Back in the day you would wave, get the bill, get your wallet out, round up a bit and walk out after putting cash on the tray. Now with cards, why is the payment terminal not brought over at once? Do most people really check their receipts carefully?

I often also do an Australian: I simply walk up to the bar or whatever and ask to pay. If I know I am not having anything beside the main, I often simply ask to pay when they serve me.