How did Pericles manage to avoid trial and account for spending huge amounts of money?

How did Pericles manage to avoid trial and account for spending huge amounts of money? To which of the citizens is the introduction of payment for the execution of elective offices? Who are Anaxagoras, Sophocles, Phidias? What, in addition to friendship with Pericles, is everyone famous for?

1. Pericles counter-charges against his enemy Thucydides and using his authority achieved his expulsion from Athens.
2. The poor, free, but poor citizens of Athens.
3. Anaxagoras is an outstanding natural philosopher, Sophocles is one of the three greatest ancient Greek tragedians, Phidias is a great ancient sculptor.