Plus if it turns out to have been caused by the Trans Bay Terminal, they have very deep pockets (they supposedly spent $58 million on a buttress to protect the Millineum Tower). As does the developer, Millennium Partners and the engineering from firm's insurance companies.
This will get fixed. There will just have to be a big fight to see who has to pay.
Edit: To be clear, I'm not denying the entire possibility. It's just extremely unlikely, especially given that the tower is currently deemed safe.