What is the fine-grained topic of the following text: While the 44-page document shows why serious nations would balk at subjecting their citizens into the kind of agreement we have entered into with MasterCard, there are several questions begging for answers about this transaction that is still shrouded in secrecy and may have violated the public procurement law. Only return the topic.
Concerns and questions about a secretive agreement with MasterCard potentially violating public procurement law.