UK Perspecitve
Something that has always puzzled me is why in the US (and US companies here like Starbrucks) there is an expectation of a tip to fill a cardboard cup with coffee or in this case, throw a parcel over a gate (or is that Yodal!)
Maybe I am missing something or it is the lack of a "Tip Culture" that we have in the UK.
Tipping in a restaurant is understood but for the roles mentioned, it is odd.