Sure you can. When i was working in the US, a friend recommend viapin.com, that is a company that sells international calling cards, I used it and work fine from a cell. OH and a extra thing is that there is no aditional cost.
By the way, I believe it is relatively easy for rich taxpayers to give the government extra money. Certainly easier than reducing our taxes by hiring a raft of tax experts. Interesting that no one admits to this practice. Seems like a bipartisan consensus -- Koch brothers, Gates, Soros, Wizard from Omaha no one does it. They all want the middle and upper middle class money to fund their party.