Interesting if Sidney includes criminal allegations in her complaint like Bribery and specifically names people to crimes.
It puts them in a pickle. If they answer, they wave their 5th. If they invoke the 5thin a civil case of fraud, a negative inference may be drawn. If everyone takes the 5th a huge case could end in a summary judgment.
Typically if crimes are alleged, the case gets put on hold until the competition of criminal proceedings . That cannot happen here because of the harm to the Country