Dead easy: nothing illegal about it gov. Hand over the dosh and the 'port is yours.
It is true. If you live outside of the EU and you are rich, a bit of a catch for a lot of people, you can buy your way in. Depending where you want to go depends on how much it cost, but you can go anywhere. Once in you are "in".
The main takers are: Germany -109,594; Spain - 114,599; France - 114,584; but in first place we have................................
The UK - 177,500 in 2011.
So, if you have enough money you can swap a third-world banana republic with a great climate for a third world chav republic with a crap climate. Enjoy.
Now what was all that about our government reducing the flow of immigrants?