Left-orderable groups that don't act on the line

We show that the group of germs at infinity of orientation-preserving homeomorphisms of R admits no action on the line. This gives an example of a left-orderable group of the same cardinality as Homeo+® that does not embed in Homeo+®. As an application of our techniques, we construct a finitely generated group of germs that does not extend to Homeo+® and, separately, extend a theorem of E. Militon on homomorphisms between groups of homeomorphisms.