I read your link and was also aware that the gift allowance for wife is a grey area . My doubt is that the 150.000 i would like to send comes from the same sender (me).
If anyone could receive this sum (that poses no problem in any case), i could also send to my son, my friend, etc. I think the tax office would smell a sort of scamming them in that case.
I personally only need to send this 150k to her without possible questions from tax office, and is not pension or income but money is there since years.