You're implying Greece did take Euro money without any intention to repay other countries. The reality is much more nuanced.

Greek did take part of a fund destined to boost their economy, like Western european countries with the US's Marshall Plan. Whether the investments made with this money were profitable or not it's up to debate, but the end game (as for Spain, Portugal and Italy) always were to improve the greek economy and middle class in order to strenghten the overall euro economy.

Now that the "southern" euro countries are in deep financial troubles, Euro bons were lended to them, not donated. Thoses bonds has to be repayed fully, but without sucking dry the Greek economy or burdening it for too long (western countries have a rap sheet of taking advantage of African countries in debt).

Please do not mistake Greeks for their representatives.