People who call themselves classical liberals today tend to have the basic view of rights and role of government that Jefferson and his contemporaries had. Moreover, they do not tend to make any important distinction between economic liberties and civil liberties.
On the left of the political spectrum, things are more complicated. The major difference between 19th century liberals and 20th century liberals is that the former believed in economic liberties and the latter did not. Twentieth century liberals believed that it is not a violation of any fundamental right for government to regulate where people work, when they work, the wages they work for, what they can buy, what they can sell, the price they can sell it for, etc. In the economic sphere, then, almost anything goes.
They ignore classical liberalism and classical liberal economics. They consider this stuff too wishy washy and lefty and socially democratic.
People who think that welfare politics forms any part of classical liberalism may also wish to read this.
Finally, I would like to quote this from Wikipedia, which is cited:
Classical liberalism is a political ideology that developed by the middle of the nineteenth century in England, western Europe, and the Americas, which provided a coherent vision of how society should be organized. Central to the classical liberalism of the nineteenth century is a commitment to the liberty of individual citizens. Freedom of religion, freedom of speech, freedom of the press, and freedom of assembly were core commitments of classical liberalism, as was the underlying conception of the proper role of just government as the protection of the liberties of individual citizens. Also central to classical liberalism was a commitment to a system of free markets as the best way to organize economic life.
Not markets governed by minimum wage regulations, or health and safety regulations, or working hours regulations or maternity leave regulations. FREE markets. Economic liberty is not, in the classical liberal model, separable from civil liberty.
So if you're going to claim that you're a classical liberal, at least find out what a classical liberal is, huh? Before frothing about how lunatic other people are, when they're just adhering to the textbook definition of something you're calling yourself!