Try looking a bit harder then. From my first google search:
"Among European countries that have grappled with the
problem of unemployed doctors are Italy, with an
unemployment rate among doctors of 17% in 1990; Austria,
with a rate of 9%; Germany, with 8%; the Netherlands,
with 6%; and Spain, with 5%. In the Nordic countries the
phenomenon is more recent-throughout most of their
history they have suffered a shortage of doctors. Since the
early 1990s, the unemployment rate among doctors has
increased rapidly in both Sweden and Finland, and is
expected to reach 10 to 15% by the year 2000"[0]
Among the unemployed doctors in countries with a large public sector of health care, there has been little interest in venturing out as private entrepreneurs. Instead, the medical profession is interested in protecting the position of doctors as employees in the public sector, which can secure their position in the division of labour in health care better than the private sector.
It can't be helped if an industry is socialised to the extent that professionals are dependant on the state. At that point the mechanics of supply and demand are affected by interference.
"Among European countries that have grappled with the problem of unemployed doctors are Italy, with an unemployment rate among doctors of 17% in 1990; Austria, with a rate of 9%; Germany, with 8%; the Netherlands, with 6%; and Spain, with 5%. In the Nordic countries the phenomenon is more recent-throughout most of their history they have suffered a shortage of doctors. Since the early 1990s, the unemployment rate among doctors has increased rapidly in both Sweden and Finland, and is expected to reach 10 to 15% by the year 2000"[0]
[0] https://journals.sagepub.com/doi/pdf/10.1177/014107689608900...