On several occasions in the past, Kumar had charged Rashtriya Janata Dal (RJD) president Lalu Prasad and his son Tejashwi Yadav of "pursuing politics for personal gains".
He also termed the opposition party a "family political asset".
"There has been deterioration in the quality of public discourse as people enter politics not by virtue of their aptitude but family backgrounds. They end up serving their own interests instead of serving the society and the country," Kumar said without mentioning any party or leader by name.
The CM, on the occasion, also spoke about efforts made by his government for improving the standards of education.
He announced that "Pataliputra School of Economics", inspired by London School of Economics, would be set up at the Aryabhatta Knowledge University here.
Underscoring the various steps taken by his government to increase enrollment of girls in school, Kumar also assured the youth that he would continue his fight to eradicate social evils of child marriage and dowry from the society.