This is really some pretty clever framing of the issue. The status quo allows folks to send their kids to unsubsidized private English schools (there are very few of these). The new bill would let folks send their kids for three years to such schools and then they would be eligible for English public schools. This is all happening because the Canadian Supreme Court ruled against the previous modification to the status quo ante--that kids would become eligible after one year of private school in English. Marois and the PQ are arguing that the new "pathway" lets the rich buy rights that the rest of the population does not have. Oooooh. Rights buying!!! Nicely framed as to make it look like the issue is of rich Anglophone immigrants buying their way into English education for their kids.
Of course, one could take a different approach, and say that the PQ is denying people the freedom to choose for themselves what is best for their kids. This would mean that all are denied rights, not just the rich. On occasion, Marois and other PQ folks have said exactly that and then retreated. Oops. So, Marois has to argue that the Canadian Supreme Court is an alien entity with no jurisdiction in Quebec, which is what she does: