Original sentence: "  Smith's opposite number, Karl Marx, also argued for a progressive tax in The Communist Manifesto: "In the most advanced countries the following will be pretty generally applicable:..a heavy progressive or graduated income tax.Advocating a progressive tax upon modes of transportation, Smith wrote: "When the toll upon carriages of luxury, upon coaches, post-chaises, &c.It was first alluded to by Adam Smith in his seminal economics text The Wealth of Nations.The idea of a progressive income tax has garnered support from economists and political scientists of many different ideologies.is made somewhat higher in proportion to their weight, than upon carriages of necessary use, such as carts, waggons, &c.the indolence and vanity of the rich is made to contribute in a very easy manner to the relief of the poor, by rendering cheaper the transportation of heavy goods to all the different parts of the country
Edited sentence: The idea of a progressive income tax was first stated by Karl Marx in the Communist Manifesto: "In the most advanced countries the following will be pretty generally applicable:..a heavy progressive or graduated income tax