Social charges (employers' contributions to social security) are often
blamed for negatively affecting employment since, being based on wage
s, they increase labour costs. Before considering the possibility of r
educing these charges, the author examines their incidence and nature;
their influence on total labour costs and on the structure of employm
ent as well as on capital-labour substitution; the consequences of alt
ernative methods of financing social security; and the question of coh
erence between financing methods and the two major types of solidarity
- national and occupational - upon which social security relies.