Germany, as per the article is one of the countries that wants more qualified majority decisions
Other countries, such as Germany and France, are pushing for qualified majority voting in the areas of foreign affairs and security.
Also, what debt are you talking about?Individual national budgets are not subject to EU vetos. And the Maastricht criteria that are supposed to regulate national debt ratios are three decades old by now.
The article keeps mentioning past pushes to abolish unanimity.
But I think It's worth mentioning that the treaty of Lisbon already changed voting rules in many fields from unanimity to qualified majority in 2014:https://en.wikipedia.org/wiki/Voting_in_the_Council_of_the_European_Union#Policy_areas
It's not like there has never been any progress in that direction.