Like GabriellaG54 I often give a little packet of home-baked goodies to the people who deliver here and also to the hard-working kids who collect the rubbish and recycling each week.
Why not? I appreciate what they do.
Actually, it never occurred to me that the Courier driver might be Muslim but my shortbread is Halal anyway. 
Not vegan though as its made with butter. If they choose not to eat it, that's okay by me.
When the lawn-mowing team come in summer, there is always a jug of juice and glasses for them too. You can't work 3 hours in temperatures of 29º+ and expect one titchy bottle of water to suffice.
I too was brought up in an era where "housewives" took out food and drink for workmen.
That was in the days before every gang had a truck with a portaloo and food provided.
I feel especially sorry for the people who stand in such heat and cold with STOP/GO signs at roadworks and in the days when I could drive, always bought something for them to eat and drink: a Mars Bar and a cold can of L&P perhaps, and handed it to them on the way back.
When I moved into my present home, it was sited on a field where 10 more houses were due to be built, most of them during the winter and in very cold, sometimes rainy conditions.
There must have been at least 20 guys working on this building site at any one time and had their own toilet facilities.
I had a crockpot of soup, cups and bread on my deck for any of them to help themselves. It goes back to my childhood, it's what you do.
I can see nothing wrong at all with such acts of humanity.
BTW MawB you can add to your list the phrase we often use here, 'wharepaku'. It means small house and comes from the days when the toilet was
out back, a separate structure in the paddock (see pic).
