Here is some reading on this topic:
https://www.thestar.com/business/2022/07/09/supermarkets-are...
https://www.thestar.com/business/2022/10/24/canadas-competit...
Suggesting that people who can't afford to eat should liaise with their elected official, who should present it to the legislature, empower the Competition Bureau to properly investigate the issue, then wait for the Competition Bureau to audit these companies and win a case through the judicial system (and that's the ideal case) – well, I think that's going to happen too slow to prevent starvation.
I'm personally worried about this because rising food prices predict riots and rebellions through history. Either prices have to come down, wages have to go up, or we're gonna see a greater loss of social cohesion and we'll have a much bigger problem on our hands. Getting the government to act on this on a macro scale is going to be a huge task given who's in power right now.