When the middle class struggles, they eventually embrace anybody who promises a break from the status quo.
Moderate parties need to ask themselves what have they done so poorly that these extremists are now becoming popular. We've seen these sort of authoritarian far-right movements across the globe and I'm not seeing moderates offer a great answer.
Personally, I would rather see a shift towards a sustainable future where the necessities of life, such as food, housing, education, health care and public transit were enshrined.
As a Spaniard, I can confirm that this is a great balanced summary of Spanish politics, in my opinion.