Then he isn't a cleric serving the community... and any cleric that isn't serving the community will soon be made unwelcome!
Any cleric that serves his divine lord, which he knows exists, is not going to be same as Joe Commoner... his god gives him those spells to carry out his god's wishes... not just so he can take it easy when he feels like it, and carry out his own agenda. Arcane magic maybe - divine magic NO.
A god certainly doesn't wish people to become dependant on one man, ne? He's serving the community, but nothing says he needs to spiritually drain himself nightly just to serve the community...it's a "feed a man a fish/teach a man to fish" kind of scenario. Yes, I could heal you right now. But then you wouldn't learn your lesson ("do not play with Alchemist's fire!"), or you wouldn't learn how to heal yourself ("I may not be around forever"), or you would come to me every time you needed it, when others may deserve it more.
If you were my cleric on this world and I saw you taking it easy when one of my worshippers needed MY assistance... well you'd hear about it! That power isn't yours, it's mine, and you wield it on that world for ME, cause I gave it to you. Damn straight on your 'day off' you're still going to use the special abilities I give you to further my cause, so whether I'm a god of healing, protection, sun, whatever it doesn't matter... my worshipper who seeks my aid has come to you... you get to do my bidding or you ain't getting nothing from me!
It takes effort to get spells...these aren't free gifts from the gods, these are the reward for a pious supplication. On his "day off", he simply doesn't spend the effort to prepare his spells. Most priests perform mass only once a week, after all.
Granted any god of tyranny, death, disease, destruction, pain, suffering etc. is going to be a different kettle of fish, but how would a cleric of that deity make it in a tiny community like your hamlet... they just wouldn't be there (if only because there's more power elsewhere).
There's a fair chance that the leaders of the community are Evil. If they are, and they have enough friends, you're in a situation where a god of wickedness could rule your daily activities, and you supplicate out of fear, not out of hope. If you DON'T, you die. If you DO, you live. Even if they're not evil, every village has it's witches, it's outcasts, it's wierd mad scientists...if you've only got a cleric or three, it's not hard to imagine that those three serve a god that most of the populous is terrified of.
Of course he's going to hold back his healing for the truly needy and those that also help the community... but as he can only cast 2 spells per day, what happens if none of the guards have a sword stuck in them come sun-down... he's going to use those spells on whoever needs them. Somedays that will be nobody, and I wasn't suggesting that he was going to cure every stubbed toe, or replace haling and herbalism skills, just that he isn't going to waste his spell and not cast it if he's not got anything better to cast it on. But most people will suffer from an unpleasant disease, or serious injury at some point in their lives, so most people will have the benefit of magic at some point.
True, most people will at some point...those two spells are for emergencies like that.

But I'd say it's probably much more efficient and exhausting to heal the militia than it is to bother usually with the commoners...which is why a lot of commoners, at some point, join the militia and gain some XP. It's got a health plan, after all.
When your neighbors are getting attacked twice a day, your healing spells will probably go for them, not for the clumbsy farmer who walked off the cliff following his flock of lemmings.
So magic can help against emergencies, but 'survival of the fittest' still applies; but some extremes of chance are reduced. And clerics are people, too.
But spells per day aren't magical capital that you can save up; they're magical bandwidth you use or lose. At dusk, or before going to bed, you use up your last few spells healing someone or creating water -- creating capital you can use later.
Most nights, at dusk, you either heal those who are near death from the nearest goblin attack, or you preside over their funeral and cast
bless on the corpse (no need for goblins AND undead...).
You create holy water. You perform a ritual to grant your brother luck (
guidance,
bless,
aid, etc.). You maybe write a scroll if you have enough gold (that's why you're charging for the spell for most folks in the first place, after all.

). You don't bother touching the wierd stranger on the corner who stinks of alcohol....at least, most of the time. You instead set up a charity for them, while helping your Sunday Night poker game with a
guidance.
Clerics are people, too...there are so many things you could do with those powers, many of them still in your god's interest (if I'm richer after poker, I can make more scrolls!; If my brother has luck in the harvest, the town will be better fed!), without having to have everyone go frolick with lepers before bedtime.
Though I'm sure frolicking with lepers happens before bedtime, too...but on special holidays, or when he's feeling very generous, or when his god's been being reticent about that healing magic recently....I don't imagine in most towns ever really having the problem with "Well, I've got this
cure light I haven't used yet today..." Especially not with two attacks each day from monsters, and only two 1d8+2's to go around.