And a lot of better educated people as well. You seem determined to place yourself in the 'poorly educated' camp.
In which case, I'm tempted to question how you can live with yourself.
At least for those with the wit to consult wikipedia and other sources.
That's not really true. Many have attempted to explain and even provided links to more detailed information on this subject. As for being 'able to do it economically', you need to compare the costs involved in the current four decades old reactors to regain some perspective.
If you think LFTR is going to be expensive, look at the massive expenditure that was required to set up the current fast breeder reactors.
That was a project that could only be funded by government budgetry expenditure levels and was only ever justified by the military's requirements at the start of the Cold War period.
The military would have been quite happy to simply dissipate the 'waste heat' to atmosphere if they could have got away with it. Adding steam turbine driven generators and calling the whole package a "Nuclear Power Station" rather trying to hide a "Weapons grade Plutonium manufacturing plant" out of sight meant they could then be hidden in plain sight (if in rather remote and heavily secured locations).
The problem of trying to hide the 'heat signature' disappeared as a consequence of this neat bit of 'lateral thinking' and the electrical energy production not only helped to subsidise the operation, it also made such facilities an "Easier Sell" to their electorate (at least until the naive anti-war, anti-nuclear, eco-warrior, greenies got wise in sufficient enough numbers to make their very real, if exagerated, concerns heard in the media).
If that is true, it behoves you to provide links to these sources. There's no point in making such unsubstantiated claims if you wish to have any chance whatsoever of winning people over to your point of view.
That statement alone shows that you have no concept of 'The Real World' and it's political modus operandi in regard to such large scale undertakings.
The German's response to the Fukushima 'incident' is very reminiscent of a bunch of headless chickens running around in a blind panic. Their response to shut down their nuclear power generation facilities was an unconsidered knee jerk reaction to an unfortunate combination of a natural disaster and lack of foresight in the design and siting of the reactor - a situation that didn't really apply to any of the german nuclear reactors afaik.
You have to keep in mind that it was the American military who funded the early MSR research up to the point where they were running a couple of test reactors before the need to power a fleet of nuclear powered nuclear bombers for weeks long patrols was rendered redundent by the development of ICBMs at which point they swiftly closed this secret project down to concentrate on the development of their other, equally secretive at the time, weapons grade plutonium manufacturing plants (aka, nuclear power stations).
Unlike the nuclear power station technology, the MSR research remained a secret until about a decade ago (I'm not sure exactly when _this_ particular cat was let out of the bag since I haven't been able to unearth a timeline for the recent interest in MSR and its renaming to LFTR).
At the time, it certainly wouldn't have been in the military's best interest to admit of the possibility of a potentially cheaper and safer way to generate vast quantities of electical energy from nuclear power when their priority was to build up weapons grade Plutonium stocks to make their 'Nuclear Deterent" policy a credible reality.
Here's yet another example of 'real world politics' shaping the technological development of our 'modern' societies.
You might think we'd have cause to complain about the "suppression of a safe nuclear power technology" by the military but anyone with half a brain would realise that world events dictated that this should be so.
Now that the military have all the plutonium they could ever use in anger (and then some!), the need to keep running all those Plutonium manufacturing plants has disappeared. Indeed, the existance of those nuclear reactors has long since become an embarrassment and the military are more than happy to have let the cat out of the bag in regard of their MSR research, especially as the priority has switched from making Plutonium to finding alternative sources of energy that can't so readily be held to ransom by hostile foreign powers.
In particular, the heading off of a third World War due to a mad scramble to acquire ownership of rapidly dwindling fossil fuel resources in 'foreign lands'. Even the military can see the futility of 'defending' a 'Way of Life' that's destined to not be worth defending in the event of an all out Nuclear Holocaust.
As things stand, if anything, the need to develop LFTR is now at a much higher priority than the Cold War inspired nuclear reactor development program ever was. If anything, this is one bit of nuclear technology the military would like to see proliferated wordwide since it takes the pressure off in regard to making a final suicidal dash for resources.