If you are qualified to do something on the UK occupation shortage list - see on this page
UK Border Agency | How to employ migrants to do jobs on the shortage occupation list the employer does not have to prove they could not find a UK citizen. If you are not so qualified the question of how an employer proves he could not find anyone else is rather academic - no-one is going to fool around trying to get a work visa for a foreign citizen if they can find a UK/EU citizen to fill their vacancy.
It is untrue that entrepreneur visas are given away! You must have £200,000 cash available to cover your business start-up costs and a plausible business plan that shows how your enterprise will provide employment for a minimum of 2 UK citizens.
I would stick to the UKBA site for visa information - many other web sites are out of date.