This isnt even close to the same. We give them money under the premise that they spend it with us.
So say we give them $500 million and they buy $500 million in airplanes from Northrop. Not a single dollar goes to their abortion schemes, because I have every single dollar accounted for.
PP doesnt have ever dollar accounted for. Thats why its fungible.
That is not why it is fungible. "Fungible" does not mean "unaccounted for" or "not earmarked for some particular use." Money is fungible because
every unit of it is interchangeable with
any other unit of it (regardless of whether some number of units of it can be accounted for in some particular use or not).
For example: When we give Israel $500 million dollars to buy $500 million worth of planes from us, we "free them up" to spend $500 million worth of their own money on
other things (such as abortion subsidies). This is money that they would not otherwise have been able to spend without reducing their expenditures elsewhere (such as for planes). It has nothing to with whether every single dollar of the $500 million we gave them can be accounted for or not. If we did not give them that $500 million, then they would have to make a choice - more planes and fewer abortions, or fewer planes and more abortions. But when we give them $500 million (even if it is earmarked only for planes and is fully accounted for), then they don't have to make that choice - they can have more planes
and more abortions (because money is fungible).
EDIT: To see how this example applies to Planned Parenthood, just replace "Israel" with "Planned Parenthood," replace "$500 million" with whatever amount of federal funding is given to PP, and replace "planes" with "services other than abortion." Thus, Trump's disclaimer that he does not support federal funding of PP-sponsored abortions - but that he
does support federal funding of
other PP activities - is essentially contradictory. Because money is fungible, federal funding for the latter (PP-sponsored services other than abortion) is tantamount to federal funding for the former (PP-sponsored abortions).