in new zealand there'll be a warden walking around car parks that has a time limit to physically draw the tires with a white colored pen, each line represents half hour i think, he'll walk around and draw. and when it hits 3 lines (1.5 hours), the warden will write a ticket.

i support tesco on this

No, you park there you're subjected to this method of monitoring.
Of course the white line will wear off.