Why is the period of Pericles’ reign called the heyday of Athenian democracy?

Pericles was the leader of the Democratic Party, under him Athens achieved the highest economic and cultural development. After the death of Ephialtos, Pericles led the Athenian democrats, and from 443 BC. became the head of the Athenian state. Legislative measures are associated with the name of Pericles, which led to the further democratization of the Athenian state system: The actual abolition of the property qualification and the replacement of voting by lot in the election of the majority of officials, the introduction of payment to officials.