The first sentence about the government having the last word is simply describing things as they are. It is not supported by anything, nor does it provide support for anything. It's just giving the reader context and background information. The next sentence is the conclusion because it provides us with the author's opinion that the government is not necessarily right. The fact that the second sentence starts with "but" is key in knowing that it's some sort of conclusion. When we read on to the third sentence, we see that the third sentence is providing support for the second sentence, assuring us that the second sentence is the conclusion of this argument.
Does that make sense? Let us know if you have any other questions!