What is the purpose was to organize and divide newly acquired land from the american revolution, to then sell to make money for the american government.

The document that mate this possible is the Land Ordinance of 1785

It organized the land into sellable areas that could then be sold to people who would inhabit those areas and work on the land. This would fill the budget of the nation while also enlarging the United States of America and increasing population.

One key element is humour! the man probably represents a politician or worker!