I'm not sure that those outcomes are really related anymore.
Smoking indoors is verboten pretty much everywhere, and has been for quite some time. IMHO, raising or lowering taxes on cigarettes won't change that, nor will it change if more people start smoking.
What makes you think that adjusting cigarette taxes would have an impact on such laws/regulations? I'm not being snarky, I just don't see the connection here.
Anecdotally, as a cigarette smoker myself, I'm glad that smoking indoors (including on transport vehicles like planes, trains and buses) isn't allowed.