BigNick
Thinks s/he gets paid by the post
+1... in fact LBYM is necessary in any case, pretty much by definition. Renting out property is just another way to increase your M if you can't do it by getting a better paid job.My point is that while LBYM may be one of the "worst" ("least efficient?") ways to build FI, it's also one of the most common. LBYM may not be as fast or as productive as landlording but not everyone can handle that occupation, let alone invest like Buffett or Soros.
There are many roads to ER.
In my case, I started my current job 20 years ago on 80K net (in today's money) and realised that because of the combination of security and pay scales in our organisation, that I would likely be making 140K net in 20 years time (ie, today). On the other hand, I didn't trust our pension scheme, so I decided to plan for retirement on the basis of its complete and utter default. Since that now seems unlikely (appropriate measures were taken), I have the choice of waiting for a decent (70K) pension at 60 with a pot of money on the side to spend, or leaving earlier with a smaller pension (20K if I went in November on my 50th birthday, increasing 5K/year for every year I stay) and living off the portfolio. In about 4 years, the income from that combination will exceed what we currently spend...
So living within our means came down to pretending, all this time, that I was still "only" making 80K, and putting the rest away. Given that even 50K net is more than 95% of households in France make(*), it wasn't too hard to do that. So if you have a "good, professional" income, like what a lawyer or doctor makes, and can avoid spending it all on clothes or sailing or cocaine, simply saving can work.
On the other hand, there's the case of my first girlfriend, who I bumped into on Facebook recebtly. She married an American, moved to the US (from England), and has made herself independently pretty well off *only* through property. I don't think she's ever had a salaried job.
(*) Of course, we have the massive advantage of not having to factor in anything for health insurance.