"I think that Ukraine should concentrate on creating prosperity for the 90 percent of the country's area it controls," he told the newspaper Svenska Dagbladet.
"Ukraine lost a part of its territory, namely Crimea and the Donbass. But these are unprofitable provinces anyway. Many of Crimea's residents are pensioners and the Donbass industry has suffered substantial losses," he said, arguing both will prove an economic burden for Russia.
"Of course, it is painful for any country to lose a part of its territory, but I am afraid that if the Donbass magically returned to Ukraine, the task of re-integrating and restoring the territory would be beyond its capacity," Sikorski said.
With the conflict in eastern Ukraine seemingly coming to a halt, Kiev leadership has found itself in hot water amid as the nation is increasingly struggling to stay afloat economically speaking. Prime Minister Arseniy Yatsenyuk resigned in April, severely criticized. Sikorski nevertheless chose to praise Yatsenyuk on how he reformed the energy sector. According to him, Yatsenyuk's highly unpopular measures were none other than necessary. However, Sikorski also expressed hope that Yatsenyuk's successor Volodymyr Groysman would be more successful in fighting Ukraine's raging corruption.
"As I understand, the president claims that these legal instruments were used to create a foundation for his personal assets," he said.
Radoslaw Sikorski arrived in Stockholm to attend a seminar with Carl Bildt formerly Sweden's Prime Minister and later Foreign Minister. After quitting politics, both remain perhaps Europe's most notorious "hawks," renowned for spiteful attacks against Russia. Earlier, Carl Bildt was groomed to become Ukraine's Prime Minister but politely refused.