Actually after reading the whole thread, I would believe it all to be more of a commonsense approach, if someone left something behind, a consumer would expect to return to either find it still there or stolen.
Mum acted in a commonsense way, to show to her child she was doing everything possible to find the toy.
Though in a Country like Singapore, the good, bad and the ugly, exist like anywhere else in the world, though commonsense is lacking in Singapore, as we see time and time again in many areas of society.
This is fact not fiction and there are plenty of court cases to prove the point that some people just do not have commonsense here!
Even if a suitcase was in anyone's way, they have no right to kick it out of the way full stop, the act is in the kick, not the moving of the object if it is obstructing. Ignorance of the law is no excuse either! No matter how amusing it may appear.
ecureilx shows us the light quite well, and the typical Singaporean attitude, though if it was his suitcase he was talking about being kicked out of the way, it would be another matter So I see it as a typical response from what kind of person?.
Maybe the shop keeper kept it for their own kids for all we know and had no intentions of returning it though that would be stealing right ecureilx? Or maybe not in Singapore!
So ecureilx i would love to see your reaction at the hawker, if the old auntie comes along and tosses your meal in the bin, while you are relieving yourself in the toilet

Now now, tell the truth! How would the typical Singaporean react?
The shop keeper didn't really care, has it didn't have much value, they thought! If it had been a camera or a watch it may have been different, but a child's toy, no chance. Commonsense would have said different; Commonsense
adj. based common sense, exhibiting good judgment
True we do find them in all walks of life, but more in some societies than others.