The situation in the German state of North-Rhine Westphalia; currently the
law is being rewritten to anchor the "polluter pays principle" in the
heritage legislation (investors were charged for rescue excavations in the
past, but the law was challenged in court and had to be replaced), but by
2015 the state will stop funding:
http://www.thelocal.de/sci-tech/20130328-48809.html
Until now the state has also run its own projects, but with civil service
cutbacks, even that has been downgraded of late.