tosh.... that line of thought reminds me of the ecomonics professor walking with one of his students.
the student says " hey professor theres a £20 in the road"
the professor says " if it was real, someone would have picked it up" 
That analogy is flawed. A £20 note on a road is a somewhat rare event. You won't find hoards of people out walking the streets with the sole purpose of finding a £20 note.
However, you will find that there is a massive demand for working from home type of jobs; massive. I've looked into it myself.
If someone has found a method of making that amount of money, that easily, you can be guaranteed that others will also find it.
If it was true, and you could make £5K per month profit, easily, working from home - in something that anyone with average intelligence and no special skill can do - then I would sell my house to be able to purchase the business.
But common sense tells me that if something sounds too good to be true, then it generally is too good to be true.