Why can't the USA pass a high "bullet tax" to make ammo prohibitively expensive and thus greatly reduce the gun use without formally violating the right to bear arms?

为什么美国不能通过一个高额的“子弹税”,使弹药昂贵到令人望而却步,从而大大减少枪支的使用,而不正式侵犯携带武器的权利?