>If you voluntarily give your free-earned money to Jeff Bezos, it's an ethical transaction. There has been some work done in economics and distributive justice

>If you voluntarily give your free-earned money to Jeff Bezos, it's an ethical transaction. There has been some work done in economics and distributive justice which casts doubts on whether any and all voluntary transactions count as 'ethical', and philosophers get a look-in here too; see economist Roberto Veneziani or Sen's work. >If you don't want billionaires in this world, you're free to stop giving them your money at any time. Economists have also spent a lot of time trying to calculate the rationality of voting vis-a-vis the expected return, and the results don't look good. The inconvenience caused by voting (and I think we could apply this to not buying from Amazon or other corporations owned by billionaires) outweighs the miniscule or 'negligible' (as the economists say in the case of voting) benefit of the owner making less money. There's a lot of research on the effectiveness and power of boycotts. It's as much an empricical argument as it is a logical one.