I agree that the pic is a total mess and no-one should leave a mess like that in a public lounge regardless if someone is there to clean it up or not.
However I disagree about the comment that a OWE wouldn't treat the facilities like that, I beg to differ, due to my companies travel policy of VA only, only my personal flying is with QF/OW at the moment, as such I am a QP Silver.
On occasion I fly QF J (paid & sometimes points) short haul, and use the Business lounge, however am very clean and would never leave an area like that.
I have seen more than my fair share of WP's, SG's and DYKWIA's (identified by Q-Tags) in the J lounge making a ripe old mess, I saw one guy(WP) near me with a piece of toast on his plate and he dropped it on the way back to his seat, he didn't pick it up and then proceeded back to the breakfast bar to get another piece of toast.
I overheard his GF/wife telling him off when he got back saying "You should have picked that up" he replied to her: "Why should I, that's what the cleaning staff are paid for".
So just goes to show that anyone at any level can be a pig.