Independent columns in Apple Pages 5.0
You could accomplish this by creating a Page Layout document. On the first page, create two side-by-side Text Boxes. Before typing, duplicate the page (control-click on the page thumbnail to the left of the editing area). Then, link each text box to its corresponding text box on the next page.



To add additional pages, go to the last page and duplicate it, to avoid having to recreate the text boxes from scratch each time.