Why is corporate bond interest included in gdp, while public bond interest is not included in gdp?

1. Interest on corporate bonds is included in GDP because enterprises borrow money from people and put it into production, such as buying machinery and equipment and providing productive services, which can be considered as creating value.

2. debt interest is not included in GDP because the debts borrowed by the government are not necessarily put into production activities, but are often used to make up the fiscal deficit. Interest on government bonds is often considered to be paid by income from taxpayers, so it is customarily considered as transfer payment.