I'm sure they can't be there to 'save water', as they auto flush as soon as you stand up, knowing good and well you still gotta wipe your ass and flush again anyways...
This was what I remember about the US restrooms before the auto-flush mechanisms came. 30-50% of the stalls in a ladies room would be unflushed and people would occasionally take their chances flushing it with their foot to get an unflushed one back in use if there was a line. Nice places had someone walk through the bathroom and flush everything, refill the paper towels and wipe down the sinks occasionally. Really nice places had people stationed in the bathroom full-time but they often expected $1-5 in tip for handing you a paper towel. Fuck, I'm only 40 but I'm old.
It's gonna take at least that long for me to wipe and get my pants back up anyways, I'm pretty sure that thing would have done flushed by the time I leave the stall.
Better yet, set the auto-flush to trigger when I open the stall door to leave, problem solved.