High margin agree, 25k $ for dax equal to 1000 point (a bit less) for few hours of market closing is unreasonable. Your comment is clueless .
Hardly, IB is primarily a securities broker that lets you trade futures. The securities clients have a lot more money in their IB accounts than the futures clients looking for low margins. Why should the futures clients put at risk the long term savings of the securities clients? Why is it do hard for you to find a broker offering low margins?