Is that really ALL of Samsung's R&D, or just their R&D for fabrication?
A lot of Intel's R&D goes into fabs, but a lot of it also goes into IC design. I find it hard to believe Samsung manages to do so much with so little, even if they are using off-the-shelf ARM cores.
That's not the direction from which you should approach those data.
Instead, approach it by starting first with TSMC's R&D expenditure as that is the a true reflection of what it costs to develop the leading edge process node technology.
TSMC spent ~$1.6B in 2013 and ~$1.9B in 2014. The 2013 number is basically going to reflect nearly 100% expenses sunk into 16FF+ development (20nm was 98% done in 2013, ramp to manufacturing was all that was left), the $300M bump in 2014 was 10nm (TSMC doubled their R&D headcount and duplicated R&D teams for 10nm).
At any rate, basically the $1.9B number from TSMC is going to be more or less the same "process tech and fab tech" expenditure contained within Samsung's R&D expense as well as Intel's. Intel's you could argue might be a bit higher just because they do a tad more path-finding research but at most you are talking about a 10% cost-adder (not a 2x multiplier).
So if it costs TSMC (and Samsung and Intel, provided their R&D efficiencies are on par with those of TSMC) ~$1.9B to polish off 16FF+ development while going fullsteam at 10nm and the early years of 7nm, then that leaves Samsung with a cool $1B ($2.9B - $1.9B = $1B) of "excess" R&D expenditures.
Now Samsung also has to spend R&D on developing dram and nand flash process node technologies, which is probably about right on the money as to where the remaining $1B goes when you compare Toshiba's and Micron's R&D budgets.
Meanwhile Nvidia, Mediatek, Broadcom, and Qualcomm show you just how silly expensive it is to design and develop the chips themselves that are fabbed on $2B process nodes.
Then you can turn your attention to Intel and gain an appreciation for how much (or little) one can reasonably assume their $11.5B R&D budget goes towards process tech development...to be sure it is more than TSMC, but do you think it is more than Samsung where their $2.9B is spread across the development of leading edge CMOS (14nm), Dram and Nand flash whereas Intel's is mostly just CMOS facing plus a bit of longer range path-finding?
That leaves a very healthy budget for design in Intel's R&D budget. But it really makes your head spin when you look at Qualcomm's monster R&D budget compared to the product lineup coming from it.
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