What are my obligations towards my adviser after the defense, revisions, and all forms signing is done? Just few days ago, I completed all requirements for the degree, all is set and done. I am organizing a workshop with my adviser to be held in few months. Right now, we are reviewing the submissions. My adviser insists that I am not qualified to review the papers because he designated me as a student organizer and my degree completion does not change that. But he expects me to write the reviews that were assigned to him! On top of that, he cannot cover my travel expenses for the workshop, because of the University policy not to pay expenses for the former students. So, I'm on my own to find the travel funding - I will need to ask my employer for funding. 

What bothers me is that when convenient, I'm treated as a student (to write the reviews), but when not convenient, I am treated as a former student (funding the travel expenses). What should I do? I talked to him twice now, and I still getting emails asking when the reviews will done.

Is this a common practice? Am I out of the line to question it? And what does this say for our future relationship working independently in the same field.

I should say that I have a job and funding lined up (funding starts after the workshop). So, I don't need a letter of recommendation from my adviser, but staying on good terms would be beneficial. On the other hand, my adviser was hoping that I could fund some of his students over the next year with the funding I received.  

Thank you!
Other cultures may have different approaches to the ethics of this, but I think it's pretty out of line for the US.

I would recommend standing by your commitment to help organize the workshop, but I would not do your former advisor's reviewing for him. You've graduated, you're a fully-fledged member of the doctoral community. 

Pete's comment is pretty spot on. Be as nice and cordial as possible, but be firm in your refusal to do his work for him.