Greece has defaulted on its repayment to International Monetary Fund this past week.
Recession and austerity have been affecting Greeks for years now. Greece simply has too much debt but few lenders to rely on since creditors doubt Greece's ability to fulfill debt obligations.
Alexis Tsipras, current Prime Minister, got into power after promising Greeks that he will end austerity for Greece. However, international creditors did not give in.
No matter how the Referendum will end today, things will be equally difficult for Greece.