Why do governments borrow money?

[kimchi]

Much of the global debt is in the form of governement debt - and this essentially is tax payer's debt.

Governments borrow money from banks who create that money out of thin air and charge the government interest on that loan.

These banks are private banks and make huge profits for lending out something they basically create on a computer screen.

If it is the government who give banks permission to do this, then why don't they just give themselves permission to do it, create the money themselves, and not pay interest?

This would save tax payers $Trillions in servicing that debt.

The only reason they do this (that I can think of) is to remove money and power from tax payers and transfer it to the big banks. After all, the big banks and bankers are more powerful than governments.