Price controls as mentioned in the post, likely one of the most effective things. Aggressively prosecuting companies for price gauging would also send a clear message. When there's a huge surge of unemployment and companies are making record profits for no reason other than greed there's a lot of things that can be done but they aren't "capitalism" so they're bad.

If we're staying closer to neolibralism than OPs post you seemingly refused to read; winfall tax, uae said tax revenue to provide inflation relief.

What should they of done*