What government or social reforms should progressives change in order to improve society?

Progressives usually aim for equality and social justice, thus, they should focus on policies that advance these goals.

Explanation:

Some of these policies could be: universal health care coverage, whether under a public system, or a mixed private/public system.

More funds for education, both in elementary, secondary, and tertiary education, making emphasis on those students who are talented but do not have enough economic resources to pay tuition.

Antoher policy could be aim at the treatment of minorities, who often bear the brunt of systemic inequalities.