Would people getting angered by this policy be angered by a rephrased policy that allows transferring sick days between workers? I'm not familiar with all the details but it sounds quite similar.
Germany requires what amounts to unlimited sick time (with variations on pay details), so there is nothing to transfer. This is just punishing people for their teammates getting sick. (So it encourages people coming in sick, but avoiding teammates. But maybe still taking meetings with other teams, since getting members of other teams sick doesn't hurt your bonus, and if it's splitting a limited pool among teams may even help it.)