Sigmar Gabriel told Stern's online edition that simply cancelling debt without many fundamental changes in Greece would not reap any benefit.
He was quoted as saying that one could "only talk about the possibility of decreasing the debts when the Greek government also shows that it is implementing reforms".
Otherwise, he warned, the debts would immediately mount up again the day after any debt restructuring.
Germany is currently standing firm in refusing to negotiate a restructuring of Greece's debt.
Gabriel, a Social Democrat who is also Chancellor Angela Merkel's deputy in a left-right coalition, also told Stern that from today's viewpoint, it had been "very naive" to allow Greece to join the eurozone.
"Worse, however, is that everyone watched on for much too long" as the country sunk deeper into crisis, he said.
Gabriel warned a lesson learned was "never again to look away when a country doesn't keep to the rules in Europe", saying this also applied to non-financial matters.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
