If your objective is to secure legal costs if needed in any employment dispute, your best option is to look at your homeowners insurance. Many policies have a Legal Expenses Insurance LEI, option - Link:
Home Insurance: Is legal expenses cover worth it? - Policy Expert Insurance
These days, many so-called unions and associations are both toothless and gutless. The Norwegian Pitiful Group, NPG and Norwegian's Long Haul Pilot Apathy, NLHPA, are perfect examples of how ineffective pilot representation has become.