It depends on the association the producers are negotiating with. For example, in terms of benefits, the only thing that's negotiated for musicians is a pension fund. The Union des artistes has managed to negotiate a pension fund and group insurance for its members. However this is generally not the case. For example, the Association des réalisateurs et réalisatrices du Québec only succeeded in negotiating a share of remuneration, which is paid into an RRSP or some kind of pension fund.
Generally speaking, few artist associations are able to negotiate attractive benefits. This is the exception rather than the rule.