I might be reading too much into this question, but it seems like the OP was trying to understand the fundamental cause of magnetism. And for the record, to the OP and to everyone else, "that's how nature works" is always a horrible answer because it doesn't tell you anything. You're just...
I'm not quite sure I fully understand your scenario, but even if we took it at face-value, it does not seem to imply absolute velocity. Under all of those circumstances (electrons in wire or in space), you only compare the relative velocities. You can't say that the electrons have an absolute...