As a result you have more parties, more diversity of choice and less polarization and of course more competition. Parties can actually go away and they do, usually every few decades.
The downside is that you can get deadlocks as no party can get a majority sometimes, even after making coalitions with smaller parties.
Still better end result than the US end result, in my opinion.
Consider a situation that starts with 12 parties. One gets 45% support, and the others each get 5% support. When the 12 parties merge into the 2 that will actually govern, that party with 45% may be the loser. The other 11 can merge to become a party with 55% of the power. The party which is most popular by far is thus locked out of power.
The “extortion’ by the Greens doesn’t seem to have damaged Germany unduly, except by forcing it down the path to so-cheap-it’s-almost-free renewable energy.
As a side note, the EU is also pushing heavily energy efficiency for homes, this might be related.
The early mothballing of Germanys nuclear reactor which where being phased out is the direct cause of the increase.
The German government decided to extend the lifetime of some reactors shortly before the event but that plan was immediately scrapped again. Risk of tsunamis itself were not the reason but rather that the public overwhelmingly did not trust the operators to follow safe procedures given that the Japenese operator didn't. But again, nuclear power was really unpopular even before that.
If you want real pork extortion, then you need a minority government propped up by a deal with an opposition party. That's what you have with the DUP.
And Ireland has had major problems like Bertie Ahern and Charles James Haughey?