It also offered to reform the value - added - tax system to set the main rate at 23 percent .
On 22 June , Tsipras presented a new Greek proposal , which included raising the retirement age gradually to 67 and curbing early retirement .
Greek also offered to reform the value - added - tax system to set the main rate at 23 percent .
On 22 June , Tsipras presented a new Greek proposal , which included raising the retirement age gradually to 67 and curbing early retirement .