I'm noting this trend of jumping to conclusions quickly - without any knowledge of more facts. If this was a clearly investigated case and this is indeed an able-bodied national serviceman and the woman in question is really a maid, fair enough. I think as much as it's fun to look at the picture and then think the best scenario where we feel manly (wow, I carried my field pack not like this guy, I'm better, he's a mommy's boy, shame on him, I wasn't one!), a picture doesn't present all the facts sometimes. I'm sure as photographers we're well aware of that. If I wanted to present an honest picture of Punggol End Beach I would probably just stand and just take well-exposed shots instead of bothering to compose.
I acknowledge that it is easy to come to such a conclusion - the picture does look like that of a national serviceman walking with his maid. Nonetheless, I would want more FACTS before coming to this conclusion, since there are possible scenarios:
1) Back injury - it's not unheard of in NS.
2) The "maid" is not a maid, but his very beloved girlfriend. If that's the case, then the way he treats her is not correct, I guess, but that's a slightly different issue.
3) Posed case by mischief doers out to create internet sensation.