Certainly Federer should be fine financially so its kind of gallant that he stuck with his native country. But I don’t really blame other tax optimizers. Tax regimes seem to me to all be predicated on the idea that everyone has an income that is steady or slightly increasing over time. Yes millionaire earners can afford to give up 50% of 1M year after year and still live well. But Working in a feast or famine niche job I can sympathize with the position of having a big payday and never knowing if one will come again. 50% hurts much more when its your life savings and you don’t know what your next job will be because you are hyper specialized.