I empathize with your concern with the poor, Authiodionitist, but I don't think that it alone is cause for you to jump ship and switch churches. If you do jump ship, then I implore you to do it for reasons of faith, not because you agree or disagree with a church's political leanings. Those change like the rise and fall of the tides, but faith - true faith -remains unchanging.
The Orthodox Church - like the Catholic church - has emphasized care and concern for the poor. However, the Catholic Church has, throughout its history, performed more missions work for the poor, in part I think, because the Orthodox Church has operated in countries that were hostile to it (such as Communist Russia or majority Muslim countries). So, I think the apparent lack of concern the Orthodox churches had for the poor was not the result of theological failings, but the failing of the political climates in which the Orthodox church operated up to recent times.
To find out the real teachings of the Orthodox Church on the state of the poor, we must consider the lives and writings of its saints. Consider this quotation from St. John Chrysostom. (Although he is considered a doctor of the Catholic Church, we Orthodox like to claim him as one of our own):
"How think you that you obey Christ's commandments, when you spend your time collecting interest, piling up loans, buying slaves like livestock, and merging business with business? ... Upon this you heap injustice, taking possession of lands and houses, and multiplying poverty and hunger."
St. John Chrysostom spent his life preaching against the wealthy in Constantinople, and urged them to give their possessions to the poor. He's one amongst many saints who had concern for the poor.
Another was Mother Maria Skobstova, a Russian nun who lived in France in the 1940s, who gave her life sheltering Jews from the Nazis. Here's a site that's devoted to her:http://www.geocities.com/Athens/Parthenon/4541/
There are many other saints who spent their lives helping the poor. There are numerous accounts in Constantinople of Emporesses who gave vast sums of their own money to build shelters for battered and homeless women. One more recent example was St. Elizabeth the New Martyr, who although she was the mother of the Tsar, gave her money and time to found convents and visited wounded soldiers in hospitals:http://www.pms.orthodoxy.ru/st-elizabeth/zhitie_e.htm
Next, I urge you to visit this site:http://www.ocmc.org/
The Orthodox Christian Mission Center is involved in missions work both here in the U.S., as well as overseas, including the Hogar Rafael Ayau Orphanage in Guatamala. They are always looking for volunteers and donations.
The work of the OCMC is to me, is the essence of the best intents of proponents of liberation theology (though I'm not sure that its volunteers would consider themselves to be liberation theologians): Putting Christ's Sermon on the Mount into actions.
-Eugenios (not a member of the OCMC, nor am I one who volunteers to help his fellow man as much as I should)