I guess the €5000 euros is an average based on a 12 months year, it will indeed slightly increase during July and August logging 100 hours per month and it will decrease up to (or near) zero in winter while you are forced to take your leave. Note also that your pension is zero, once you are 65 you'll be forced to live under a bridge.
Let's be truthful! you are treated like a slave and you are happy with that.
...so, will you tell us how much you payed for your epaulets??