Honey
You cannot get young or even "middle-aged" RNs into whites, much less starched whites. If any DON or CofS even suggested caps they would have as all out war on their hands.
Some hospitals are going back to whites, or white scrubs, but it's the god awful poly or cotton/poly blends. Story is the same, aside form perhaps L&d, OR and a few units, hospitals aren't interested in paying for and or laundering staff uniforms or scrubs.
Besides, there are few if any good nursing apparel makers in the USA anymore. Many of those that made "starched whites" and even good quality poly/cotton are long out of business. Some victums of the movement of American textile work to Asia,others when nursing fell into decline and or nurses started to wear scrubs. Some survived one blow, but couldn't make all three.
Some nurses and their unions have tried to get hospitals to either launder uniforms when mandated, and or give a decent uniform allowance, but by and large hospitals have firmly rejected to former,and are very stingy with the later.