Whistling garbage men

The garbage men in Nepal blows a whistle when they come down the street. It's very annoying and I will forever think about garbage when I hear a whistle.
After the whistler a truck is coming to pick up the garbage we have put out in the street.
There is no schedule. Sometimes they come twice a week, somtimes they come every other week, but before this holiday they came EVERY day. Why, you might wonder.
Maybe it's because they are going to their villages and not come back in a few weeks, so they sort of picked up the future garbage in advance.
Or maybe they are obliged to run the garbage round a special number of times each year and to keep the contract they run it extra many times before they go.
Well, either way it doesn't help us.