The main figures that backs & wishes Kaká in Paris is his ex-Coach at Milan, Carlo Ancelotti & ex team-mate Leonardo, the former now PSG Coach & the latter the Club Football Director both which know well Kaká & believe they can get the best out of the player as he enters his "twilight years".
If asked for my opinion, I would think at this stage that if PSG can raise their offer to around the 35M€ that Real Madrid will sell & at least recover some of their initial investment. The player currently costs Real Madrid 10M€ / year & he is not playing which is not a good business situation.
LASTEST: Kaka dismisses the news out of Italy & denies he has any agreement with PSG. I do remember him saying the same thing while an AC Milan player - several times - & he ended up at Real Madrid