best way to increase tznius is to home school our daughters and dress them in Burkas when they MUST go out. Girls and ultimately Noshim, including married Noshim must be taught they are intrinsically evil and their bodies are objects of shame. Once this message gets accross all women will indeed be too ashamed to allow any part of their bodies to be exposed and they will avoid any public appearances.
But this will raise a hugh problem — how will families get their groceries and their meals cooked and laundry washed. The answer is obvious “separate hours” women will only be allowed out at night and men during the day