The writer must earn money in order to be able to live and to write, but he must by no means live and write for the purpose of making money.
Go on, get out - last words are for fools who haven't said enough. To his housekeeper, who urged him to tell her his last words so she could write them down for posterity.
The writer may very well serve a movement of history as its mouthpiece, but he cannot of course create it.