You would likely have to, for the simple reason that if Cancer gets cured, more resources can be dedicated to dealing with other diseases, meaning even more lives will be saved in the process (on top of those lives saved due to the curing of Cancer).
The economy can be in shambles for a while, but it can recover in the future, unlike cancer patients..and you could always justifying it that if a banker like you could blow up the economy, it was already too weak in the first place: better to blow it up now when the damage can be limited rather than latter.
Though the reason it doesn’t appeal is because you don’t quote hard numbers, making the consequentalist rely on “value” judgements when doing his deeds...and different consequentalists have different “values”. Your consequentalist would be trying to cure cancer by crashing the economy to raise money for a cancer charity, while a different consequentalist could be embezzling money from that same cancer charity in an attempt to save the economy from crashing.
“Germany should completely lose all the baggage of Nazism and replace it with a completely democratic society that has no causal linkage whatsoever to its bloody past.”
General Y is advocating for an absolute bastardization of history as much as General F. You cannot deny the past, because the past shaped your country and what your country did. There is a difference between interpreting the “real” meaning of Nazism, and actually erasing Nazism from history, as General Y wants.
General Y also want to place all blame on the the Nazi regime, thereby excusing the rest of the German population for actually supporting the National Socialists to begin with! You aren’t dealing with “militant nationalism” here at all. You’re dealing with HUMAN BEINGS.
Finally, General F could argue that de-Nazification could get out of control, leading to the rise of left wing terrorist groups who argued you haven’t done enough de-Nazification and the only way to remove the “Nazi taint” is to destroy capitalism entirely and surrender to the Soviet Union.
http://en.wikipedia.org/wiki/Denazification#The_radical_left_in_Germany_during_the_1960s.E2.80.9370s_and_Nazi_allegations