LLLQNH
You may want to start to accept the new reality. You signed your seniority away last November. This company care nothing about you and your family. You are an expense to the company, and they will always look for the cheaper option. This also means that if you have children, you are likely more expensive, and easier to punt when they need more staff cuts. Don't think for a second that the company will choose you or your family's well being over a dollar.
Going on about "just the way it's done" or an "industry always has been Seniority driven" makes you look a little deluded, and chasing a ship that sailed long ago.