In at least two Rolling Stones songs, "Salt of the Earth" and "Dandelion", Mick Jagger pronounces the word "soldier" the "old" way, where "d" and "i" are still distinct and not fused into
dʒ (the term seems to be non-palatalized.)
instead of the now-common
Was this still a common way to pronounce the word in everyday English in the late '60's, when these songs were released?
Or was the pronunciation already extinct in everyday English, and this a deliberate stylistic choice to sound more "posh" - given that English accents perceived as upper-class seem to have been very resistant to palatalization?