Disagree. Everyone needs to realize that having two parents who both have "greedy jobs" is a path to misery. Giving out childcare does not change the situation. One parent will always need to step back from their career or there will be misery, I've seen too many cases. Even if both parents are comfortable putting their kid in daycare 9 to 11 hours a day (to cover both the workday and the commute), which they should not be, they still have to deal with many sick days, needing to be out of work by 6pm every day, not going on business trips, teacher's conferences, school plays, PTA meetings, not getting a good night sleep because baby or toddler is having a sleep regression, etc. etc. There is no world where you provide everyone universal childcare and now both parents can "work to their full potential" and "give the economy their best."
The reality furthermore is that there are few non-greedy jobs that are non-subsidized/non-fake and that contribute to the economy enough to be of more value than childcare. Subsidizing childcare, so the second parent can get a non-greedy job as a neighborbood coffeeshop owner, or working as a strict 9-5 government lawyer, isn't really a win for the economy.
From what I understand, most European countries optimize for something like "cozy economic conditions" rather than "maximizing economic potential" so neither my comment or the comment I was replying to would apply Europe. What I have seen in the U.S. is misery resulting from two parents working greedy jobs, like one is a high-powered lawyer, the other is engineer at a startup and then having a baby or 1 year old or two year old in daycare. One is a sales rep, the other is working a political campaign. What do you do when baby is sick and dad has to make sales quota and mom has a deadline for engineering documents that the entire construction project is bottlenecked on? What do you do when both parents need to stay late at the office, one to finish the legal docs big deal, the other to make a product launch deadline? Stress and fights over whose job is the most important results. What if baby is sick and waking up at night every 30 minutes? Who gets to be sleep deprived?
Then you get your kid to preschool which is either paid or free. In this way the mother (who usually has more burden related to breastfeeding etc.) can finally breathe freely. Can she go to work? Yes, and in some Europaen countries she has the right to ask for part work with the current employer, and they can't refuse. A few years later the kid goes to school (again, paid or free) and parents can decide how they organize their lives based on their needs an expectations. If your kid is sick, you can stay with them, and I always assumed this is normal and civilized way, I can't imagine otherwise.
I am curious though, would this job that mom goes back to actually be more "productive" than taking care of a four year-old and two-year old human child?
Actually, any job she likes? In this case, it's not for the baby, it's for her. Being with a child 24/7 has its toll, and people are social animals, they like being with others. In this case, work - especially white collar - is a kind of rest for parents. At least this is the attitude of many fresh mums (and dads) around me.
And what exactly are these jobs that are a rest compared to taking care of a baby? Are they actually economically productive or are they bureaucratic fake jobs?
I have noticed that many of my peer parents make parenting more stressful than it needs to be, and don't invest enough in learning techniques to make it less stressful. Like, some parents don't even invest in baby-proofing and then they are constantly chasing their toddler around. But, the first year of baby is always going to be stressful because everything is so new, just as the first year at a brand new job is always going to be more stressful than a job one is highly experienced at.