On 22 October , Greece 's top tax collection official , Katerina Savvaidou , was sacked by Alexis Tsipras .
Katerina Savvaidou had allegedly granted an extension to television stations to pay a 20 per cent tax on advertising .
On 22 October , Greece 's top tax collection official , Katerina Savvaidou , was sacked by Alexis Tsipras , because she had allegedly granted an extension to television stations to pay a 20 per cent tax on advertising .