BUT...that plumber could create a company hiring local plumbers in 20 different countries, and sell plumbing services locally in each of those countries, and incorporate the overall business in a friendly tax country.
So your example isn't really valid. I argue that ANYONE can take advantage of globalization with a little thought. If you choose not to, and Apple chooses TO do...well its really your own fault and choice...isn't it?
That's just one simple example...that plumber could create a digital course that teaches others to become plumbers...or teaches plumbers to market their services better...he could package that digital product, incorporate a company in singapore or WHEREVER he finds the best corporate tax rate, and take advantage of the same things Apple does...
I could go on and on...it's all choice. You chose to be proactive or you choose to snipe at others who do...A thing is not unfair if everyone has the ability to take advantage of it...and some simply choose not to because it's hard.