In my opinion, the people who are treated most unfairly in Philippine society are the Minorities (Indigenous, LGBT) and the Illiterate. The Illiterate are the one who are treated the worst for they are given human dignity just because they need extra help in doing things. The minorities still experience discrimination because there are still some Filipinos who are ignorant about what they are and they don't have apathy for these people.
What can I do to promote justice to these people is to spread awareness that these kinds of people exists and we must also acknowledge that they should be treated nicely. Toppling the idea or ignorance of others may bear to an epiphany and change of mind towards these people.