It depends what kind of tax. If you pay rent from using land that's like the most legitimate thing that they own the land and you use it so you pay for it. But if they tax your ETF capital gains that you have made in different country from money that you have invested before you started living there then there is not much legitimate about it. Because the moving thing it's kind of cope of digital nomads. Many businesses farms, factories, mines can't be moved so the government can basically tax whatever but that doesn't make it legitimate. 

 Why does it depend? If you don't want to play it, you're free to leave.  

 That's nice thing for single bitcoiner digital nomands. You cannot build society on that. For most families or businesses moving is more costly than paying 30% tax. That doesn't make the tax legitimate that just means that thugs are stronger and have advantage. Choosing to pay a robber rather than dying doesn't make robbery legitimate. It's a victim blaming telling that people who don't move agree with tax. We as a society need farmers and families and factories in order to survive a humanity  

 It's not that expensive to move if the closest alternate jurisdiction is 10-20 miles away. That's quite the cop out. And if you are truly opressed would you not move for your future generations, no matter the cost?