My understanding of Singapore work culture though is it's intense and competitive. Yes the housing is cheaper and more accessible but it's the same age to get there (maybe a bit earlier). You aren't "economically secure" earlier in life than in Western countries. I don't know enough Vienna's system to speak for it.
This has nothing to do with economic security.
Everyone is now dopamine maxxing on smartphones and internet. There's no desire to have kids because kids were a pre-internet and pre-modernity phenomena.
Now that we're fully entertained, there's little need for having children. The FYP has enough entertainment to overcome the biological itch.
Evolution did not anticipate social media and hyper addictive algorithms.
We're microdosing on pleasure and that's desensitized every biological urge to raise children.
Technology did this.