Your love and burden for your younger brother is a beautiful reflection of what it means to be your brother's keeper. Scripture makes it clear that we are indeed called to watch over our brothers and sisters, and as an older sibling you carry a special responsibility to intercede for him, to stand in the gap, and to love him through this hard season. God sees the anguish of his soul, even when others at his workplace do not, and He hears your prayers.
In the story of Joseph and his brothers we see how deeply a family can feel the weight of a younger brother's suffering. The brothers later confessed that they had seen the anguish of their brother's soul when he pleaded with them and they did not listen, and that memory stayed with them. Jacob was so protective of his youngest son that he feared harm would come to him, and when Joseph finally saw his younger brother again after many years, his prayer for him was simply, God be gracious to you, my son. That is my prayer for your brother as well, that God would be gracious to him, guard his health, and give him peace in his heart and peace in the place where he works. Even mistreatment and hardship at work can be places where God is at work to preserve life and to shape character, as Joseph was able to tell his brothers that God had sent him ahead to preserve life.
There is also a call to loving, honest restoration. One brother in that same story offered himself as a substitute, saying he would remain so his younger brother could go free to his father. That spirit of intercession is what the apostle Paul showed when he pleaded for Onesimus, asking that he be received no longer as a servant but as a beloved brother, and even offering to pay any debt owed. You are doing that kind of interceding now, bringing your brother's name before the Lord. Part of that love is also speaking the truth gently about the things that are harming him. Scripture teaches that if a brother is caught in sin we should go to him privately with the goal of restoration, seeking to gain our brother, not to shame him. Drunkenness and the debts that follow bring deep trouble and steal a person's responsibility and peace, and God calls us to turn from them and walk in sobriety and self control. The most loving thing you can do is to continue praying, and also to go to him humbly, tell him you love him, acknowledge the pain he feels at work, and urge him to turn from alcohol and to take responsible steps with his finances, perhaps with wise counsel from a mature believer who can help him.
Reconciliation often comes through humility and blessing, as it did when Jacob humbled himself before his brother Esau, bowed low, offered gifts from what God had given him, and then embraced him, and the love that had been broken was rekindled. Pray that God would soften hearts at your brother's workplace, and that your brother would also respond with humility and integrity, not with bitterness or escape through drinking.
Let us pray together for him. Father, in the name of Jesus Christ who alone is our Savior, I bring this younger brother before You. You know the mistreatment he faces at work, the discouragement that makes him want to quit, the temptation to drink, and the burden of debt. Have mercy and be gracious to him. Touch his body and give him good health, calm his mind and give him Your peace that passes understanding, and bring peace also to his workplace. Deliver him from the desire for alcohol, set him free from every chain, and teach him to be responsible and steady again. Help him to acknowledge his need for You, to confess his sin, and to receive Your forgiveness and new life through Jesus. Provide for his debts, give him wisdom to work diligently and honestly, and surround him with people who will encourage him in the right way. Strengthen his older sibling who is praying, give comfort and hope where there is weariness, and let this family see Your preserving hand at work. Amen.