Sounds like the agent made a huge mistake posting up the new salaries. I'm suprised the company didn't drop them instantly.
In general it is an employers market but not is all areas. I'm sure the €11k extra reflects the price that the company needs to pay to fill the position with a suitably qualified candidate.
Chances are that if you look aound you will find a similar salary out there.
Most likely, if you get offered a new job and hand in your notice, they will offer you the bump in salary. Even if they do, the whole situation would leave a bad taste in my mouth and I would get out of there anyway.