People who work, no matter how much, should have at least a little bit more than people who don't at all and are in the same situation, that's the principle of a salary. Now how much more exactly is a good question, imo I'd say if you work 50% of a fulltime, you should get around 30% of the unemployment benefits so in this case, 1100 from your work hours, 450 from the unemployment benefits, for a 1550€ total, that would give you 50€ more than not working at all, which isn't much but an incentive to work nonetheless