Devlok Mini - Why is Tirupati Balaji under debt?

Devdutt Pattanaik talks about the time when Lord Vishnu descended to Earth in the form of Lord Tirupati Balaji to make up with Devi Laxmi, in this process Lord Vishnu ends up taking a huge loan from Kuber. Lord Tirupati Balaji is still paying his debt to Kuber.