They also remember what work is. They come from a culture where they can be sacked at the drop of a hat, so they work to keep their jobs.
They will eventually learn the wicked ways of the EEC where you cannot sack someone because they are useless. you must tell them they are useless, then you must write it down so they can read it for themselves. Then you must write it down again, and only after you have done that can you sack them.
Then they can go get legal aid and fight you through an employment tribunal, in an effort to prove they aren't useless.
If you as their employer are really lucky you will be able to prove they were useless, and all you will have to pay is a couple of thousand pounds to your lawyer for the privilege.
No need to wonder why as an employer one would prefer to take on staff who still remember the work ethic.