Since the discussion seems to have petered out, here's a different thought to chew.
We have solid hints to think that all the sibling businesses have financial troubles, including Krauss. However, the way their troubles are described, none of them are in an
immediate danger, which is supported by the timing constraints they list when proposing their agreement.
- Krauss, according to Ep5, has a rolling long term plan that will eventually pull him out.
- Rudolf needs more money than he has but he still has some time before he needs to pay it, and actually, he could go to court and stall the case until Kinzo's inheritance is distributed, or have a chance to actually win, stranger things have happened.
- Hideyoshi, similarly, needs more money than he has, but he is only in danger if the hostile takeover campaign actually succeeds, while it depends on a lot more variables.
- Rosa's loan has been apparently hanging over her for years and somehow failed to shut her down economically, there's no reason why it would immediately do so now.
But unlike the rest of the siblings, Krauss has a fatal flaw in his position that can be exploited right now -- he did commit an actual crime, that of embezzlement, and the siblings have good grounds to suspect him of other illegal activities related to Kinzo's untimely death.
So why, when Krauss tells them he is aware of their financial troubles and the
reasons they need
extra money, they seem to back off, at least temporarily? Krauss knowing their weak spots does not actually allow him to exploit them. All he can do is deny giving them money, but he was planning to do that anyway. His own position remains just as weakened as it was after telling them he knows.
Do they really back off, or do they always actually press on to discover Kinzo's death?