And corporate credit cards aren't blank checks. Employees will generally have to pay back any spend on their corporate card that is not approved as an expense.

And corporate credit cards aren't blank checks. Employees will generally have to pay back any spend on their corporate card that is not approved as an expense. It may prevent the employee from holding the bag if the company goes bust. But some "corporate cards" are issued by banks in a way that makes the cardholder jointly liable.