Tiefensee is actually in the goverment, therefore he would not change his mind when switching from opposition to goverment.
and they already tried to sell the shares (DFS is a private company owend by the state) but they stumbeld over our President Köhler.
The most important point in selling part of the DFS is the money, but in the present economical climate they don't need the few bucks to fill some gaps, since the taxes provide enough income in the moment.
Saigor