Very interesting discussion!
Remember some year ago now i did a test (tried my best not to be biased) and the end result was saying i was not probably considered self employed. Few questions was if i could work for others, did i bring my own equipment to the office and who was controlling the work. So it looked thin all in all and opposite to what my contract said...
Then uber where i believe their drivers at least have more control of work, have their own car and i guess can decide how much to work, without saying either or they are self employed but at least they seem more self employed than the average pilot does. Last word not said but if they are considered employees then it's says a lot about the status of pilots in general imho...