It is merely a theory that explains how free enterprise works. Banks for example, a very important part of the economy, are left out. Some socities do not accept the circular flow model theory. These socities, therefore, choose another economic system other than capitalism. Socialists and communists see the role of the government in a different light than capitalists do.
2016-12-19T10:12:29-05:00. Modern presidents pro tempore, too, rarely preside over the Senate. In practice, the junior senators of the majority party typically preside in order to learn Senate procedure. The current Vice President of the United States and President of the United States Senate is Joe Biden.
The vice president is the official head of the senate (really only used for ties in voting), but in terms of an actual elected senator, the official title is the President pro tempore (name for the senator).