There's five things a country can do:

1. Stay in the Euro, keep paying creditors, keep borrowing and pretending (status quo)

2. Stay in the Euro, keep paying creditors, stop irrational spending (the "diet and exercise" answer because it works the best but nobody ever does it)

3. Stay in the Euro, default on debts, irrational spending stops by force because nobody will lend you any more money. Government is fucked, but the country keeps functioning.

4. Leave the Euro, keep paying creditors, keep borrowing and pretending (hyperinflation 💀 )

5. Leave the Euro, keep paying creditors, stop irrational spending (haha nobody gonna do that shit, nice try)

6. Leave the Euro, default on debts... Become financially very isolated, hard to convince anyone to accept your money on foreign exchange markets, imports become challenging, foreign investment scared, probably 💀