There are no boundaries between fiscal and social - true.
But the boundaries vary depending on culture.
In the US with such wide variations in culture the widest latitudes possible should be given. Otherwise enforcement costs go through the roof and you get a cohort used to disrespecting law in general not just the ones they break. Thus eventually a break down of law and order. We saw this in alcohol prohibition for which we had a 20 year hangover.
Never pass laws that won't be 99+% obeyed. It is bad for the rule of law.
If people are making bad choices it is best to let Darwin sort it out. That is the low cost way.
BTW self elimination is rather different than forced elimination. Even if the reasons are the same. i.e. populations excessive (in productivity terms) vs available resources. Compare: a one child policy chosen by individuals (by all means at their disposal) vs enforced by government (by all means at their disposal).
And the biggest cultural divide is thermodynamic.
A thermodynamic explanation of politics
The abortion divide is in the main a thermodynamic divide. It makes thermodynamic sense for more city folk than rural folk to have abortions (on a per capita basis). Which tells you that trying to stop the practice is not going to work well.
And sorting the thermodynamics to end abortion will not be easy. The city niche is quite different from the suburban/rural niche. And the city thing may be a population density thing (seen in mice) vs some kind of vast cultural plot. But cities get their value from concentration - despite being poor breeding grounds.
Positing all this as a moral question will get you zero results. Because it is not a moral question - it is a thermodynamic/population density question. You are not going to get anywhere if you think 2+2 = Paris. Even if you believe it with all your heart. The grocery store is not going to accept Paris as the answer to the price of the groceries in your shopping cart no matter how much you want to believe it. Nature is even more unforgiving than the grocery store.
The dogma useful for an agglomeration of small tribes may not be too handy in the case of cities, states, and nations taken as a whole. Of course if we were all still herding goats and tending fields such dogma could work even if it was old - that was the condition of mankind for the longest time. But in a nation where 2% or so farm and the rest do something else "whose ox is gored" may no longer be a very important issue.
Be fruitful and multiply is good advice if you need farm hands. It is not good advice for city dwellers. Apartment space is limited and expensive.
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Of course my #1 mistake in life is treating all problems as if they were engineering problems.
1. What is the objective?
2. What are the important relationships between the factors?
3. How much are you willing to pay for the results you desire?
Of course you can skip #2 (because it is a moral problem) but #3 will get you in the end. Even in moral problems I prefer to match ends with means. But that is because I prefer results to looking busy. Another of my failings.
In that regard you might like my comment to this post:
http://www.classicalvalues.com/archives ... ve_wa.html