I don't believe a parent has to give their child every possible advantage, regardless of the cost.
I completely agree. But we're not talking about a parent sacrificing their future, or their shelter, or their health. We're talking about a parent who would rather have an extra $100,000 than give their own child a better chance at success.
Here's what it comes down to for me. Let's say you take a look at the general population, and it turns out that x% of us came from divorced or single parent households, and thus spent a good portion of our youth in daycare.
Then you look at the population of criminals and drug addicts (sorry to repeat myself), and notice that y% of them
came from divorced or single parent households, and spent their formative years in daycare.
I'm saying y is significantly greater than x. We don't all have an equal chance of becoming a criminal or drug addict. Going to daycare increases your risk of falling into negative patterns later in life. It's very
taboo to say this out loud, because our culture values parenting and families above all else, but the numbers don't lie. Just look at the statistics for the US's prison population. It's right there in black and white. The percentage of incarcerated individuals who had 2 married parents growing up - one of whom stayed home to raise the children - is undeniably less than the same statistic for the general public.
Thus, if you have the option of giving your child a 100-x % chance of not becoming a criminal or drug addict, but you instead choose
to roll the dice and give them a 100-y% chance, then that's selfish.
If your child is in daycare because of unfortunate circumstances (dad turned out to be a drunk/abuser/deadbeat, now you're a single parent), then that's one thing. All you can do is make the most of a bad situation. But it seems clear to me that the best
situation is for a child to be raised by his/her own parent. Dealing with life's curveballs is one thing, but voluntarily choosing to put your child in the high-risk group because you want more money (when you already have way more than you need), or because raising a kid turned out to be more work than the fairy tales led you to believe (and thus you're "grumpy"), then I believe that's putting your own interests ahead of your child's.