Friday Postcards - Hey, Hey! We're the Monkeys

I love this series of postcards, but I do find them somewhat mysterious. Someone has gone to a lot of trouble to set up these homely scenes of monkey life, but what are they trying to portray?

What is the message? What do they symbolise? What is the relationship between them? Is Big Monkey a kind of Everyman, living out a dull and ultimately meaningless existence? Does it say we are all just apes, even if we wear a shirt and tie? Or are they trying to tell us, "Yes! There is jam on your daily bread. There is comfort to be found in the sharing of a simple meal. Yes! We have no bananas."? 

And is Little Monkey really a doctor?