Your link is from 2014 and it states that .
"( At the beginning of this year, nine European countries lifted controls on labor immigration from Bulgaria and Romania, prompting some fears, particularly in Britain, about a flood of low-wage workers coming from two of the EU’s poorest countries. (As it happens, only a handful of workers from the two countries have arrived in Britain since the controls were lifted.)"
That is when they were allowed to come to the UK and they didnt come , you were trying to show that Romanian Doctors wanted to come to the UK to work and the link that you provided showed they didnt actually want to come to work in the UK when they were allowed to
"The article notes that the net starting salary for a doctor in Bucharest is about 350 euros per month, compared with as much as 3,000 euros in Britain or Germany."
Then when you factor in home rental costs , local travel expenses , tax and other living costs , that 3000 doesn't go far