You also get small parties extorting billions in pork for their support or pet project in the UK the DUP and Libdems in the previous coalition did this and likewise the greens in Germany.
We haven't had a single-party government in Ireland since the '50s, and it hasn't done us a lick of harm. Quite the opposite, in fact, as junior parties tend to be a moderating influence on the senior one. If anything, it's typically the junior party that gets shafted the most when the elections come.
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.
The DUP and LibDems are examples of FPTP distortions in the UK.
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.
https://en.wikipedia.org/wiki/Electricity_sector_in_Germany
"According to Forbes, the IEA reports that in 2015, German prices were 17.9 cents per kwh for industry, and 39.5 cents per kwh for residential customers, versus 7 and 12.5 cents respectively in the U.S."
In what measure is that a result of bad policy and or a result of a desire to promote thriftiness? After all gas in the US is cheap and in Europe it's expensive and I think a major part of the price are excises meant to discourage consumpation.
As a side note, the EU is also pushing heavily energy efficiency for homes, this might be related.
The German nuclear phase-out and funding of renewable energy development through electricity taxes was started in 2000, a decade before the Fukushima event and as a direct result of a (by then) two decade old environmental movement.
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.