Should artists, who naturally retains the copyright for their artwork, receive a percentage of the profits made from their artwork that is resold on the market?
US remains undecided on the grounds of fairness to all producers of re-sellable goods. Here's the argument against providing resell rights for artists: http://www.law.harvard.edu/faculty/martin/art_law/why_resale_rights_for_artists.htm
To learn more about the business of reselling art:
For a general summary of resell rights in Europe: http://painting.about.com/od/careerdevelopment/a/ArtResaleRight.htm