In many (if not all EU countries) in order to be considered contractors they have to show there is no single entity that provides the contracts/money.
That prevents companies from hiring their own employees as contractors and avoiding paying social tax or ensuring annual vacation, etc.
As stated earlier Uber have been banned already in some EU countries altogether unless they choose to register as taxi business and comply with the local (country/municipality) regulations.
The claim is unsubstantiated: "...has 50,000 drivers across the country, most of whom work exclusively for Uber." [0]
I very much doubt that drivers would be employed in a regular taxi company while taking Uber calls at the same time.
That prevents companies from hiring their own employees as contractors and avoiding paying social tax or ensuring annual vacation, etc.
As stated earlier Uber have been banned already in some EU countries altogether unless they choose to register as taxi business and comply with the local (country/municipality) regulations.