You really don't need to fully uderstand it to execute the plan. Save a lot of your earnings, invest them in US companies, retire when you have enough. Investment gains are taxed differently, or not at all if you do it correctly.
MarciaB - no biggie, I wasn't trying to trump you, just linking to the other one. It was actually a stale thread where someone referenced his website, then when he posted today he linked to the article. I've linked to his never pay taxes again post here 20+ times. It's a very exciting concept.