One could send money to charities who are doing such work. One could join a social or political movement to get many people and governments to directly alleviate poverty. It is a reliable pattern that as people rise above extreme poverty and gain more opportunities, they quit very bad jobs and put their kids in schools. A person with universal morality would not go and demonstrate at a meeting of the World Trade Organization. That sends the wrong message.
Universal morality is always the best.
Under the conditions of the world economy of the last fifteen years, transactional morality is the worst, and capitalist morality is second best. We are living in a world where about 30 percent of human beings are illiterate, and a similar percentage live in such poverty that sweatshops, child labor, and environmental abuse are attractive to them. A few decades ago, most humans lived like that. If we let the capitalist world economy go forward, without blocking transactions or sanctioning the poorer countries, and by reducing protectionist barriers in rich countries, then in another decade or so, it is reasonable to expect that no more than a fifth of all humans will live in illiteracy and destitution. And we can keep going.