Refactored.cs

    public class SituationItem
    {
        public string id;
        public string displayName;
        public bool? defaultVal;

        private SituationItem(string id, string displayName, bool? defaultVal)
        {
            this.id = id;
            this.displayName = displayName;
            this.defaultVal = defaultVal;
        }
    }

    public class SituationCategory
    {
        public string displayName;
        public List<SituationItem> items;

        private SituationCategory(string displayName, List<SituationItem> items)
        {
            this.displayName = displayName;
            this.items = items;
        }
    }

    public class idekAtThisPoint
    {
        public static readonly List<SituationCategory> allSituations = new List<SituationCategory>();
        
        private idekAtThisPoint()
        {
            allSituations.Add(new SituationCategory("Generic Emergencies", new List<SituationItem> {
                new SituationItem("system_eng_vibrations_above_maximum", "Engine vibrations outside of safe range", false),
            }))
        }
    }

RefactorMePlsBae.cs

    static class Lists
    {
        public static readonly List<Tuple<string, string>> crewSituations = new List<Tuple<string, string>>
        {
            new Tuple<string, string> ( "First Officer incapacitated", "crew_fo_incapacitated" ),
            new Tuple<string, string> ( "A member of the cabin crew feel unwell", "crew_cabin_sick" ),
            new Tuple<string, string> ( "A member of the cabin crew has fainted", "crew_cabin_fainted" ),
        };

        public static readonly List<Tuple<string, string>> emergencySituations = new List<Tuple<string, string>>
        {
            new Tuple<string, string> ( "Lavatory fire", "emergency_fire_lavatory" ),
            new Tuple<string, string> ( "Samsung Galaxy Note 7 is onboard", "emergency_fire_samsung_note_seven" ),
            new Tuple<string, string> ( "Rapid decompression", "emergency_rapid_decompression" ),
        };
        public static readonly List<Tuple<string, string>> passengerSituations = new List<Tuple<string, string>>
        {
            new Tuple<string, string> ( "Pax feels unwell", "pax_unwell" ),
            new Tuple<string, string> ( "Pax is suffering from an unknown medical emergency", "pax_medical_emergency" ),
            new Tuple<string, string> ( "Pax is violent", "pax_violent" ),
            new Tuple<string, string> ( "Pax is drunk", "pax_drunk" ),
            new Tuple<string, string> ( "Pax is being abusive", "pax_abusive" ),
            new Tuple<string, string> ( "Pax is attempting to enter the cockpit", "pax_hijack" ),
            new Tuple<string, string> ( "Pax has died", "pax_dead" ),
            new Tuple<string, string> ( "Pax is unconscious", "pax_unconscious" ),
            new Tuple<string, string> ( "Pax has a weapon", "pax_armed_and_dangerous" ),
            new Tuple<string, string> ( "Pax had a panic attack", "pax_panic_attack" ),
        };

        public static readonly List<Tuple<string, string>> systemSituations = new List<Tuple<string, string>>
        {
            new Tuple<string, string> ( "Engine vibrations outside of safe range", "system_eng_vibrations_above_maximum" ),
        };
    }

    public class Situations
    {
        public static readonly List<Tuple<string, List<Tuple<string, string>>>> allSituations = new List<Tuple<string, List<Tuple<string, string>>>>
        {
            new Tuple<string, List<Tuple<string, string>>> ( "Generic Emergencies", Lists.emergencySituations ),
            new Tuple<string, List<Tuple<string, string>>> ( "Passenger", Lists.passengerSituations ),
            new Tuple<string, List<Tuple<string, string>>> ( "Aircraft Warnings and Failures", Lists.systemSituations ),
            new Tuple<string, List<Tuple<string, string>>> ( "Onboard Crew", Lists.crewSituations ),
        };
    }