You are repeating yourself. The financial shortfall in Social Security is not the problem; the financial shortfall is result of the problem. Putting more money at the front end of the Social Security pyramid scheme no matter where it comes from does NOT solve the cause of the financial shortfall. I know, my letters are not big but read that as many times as it takes for you to understand.
Tariff revenue has not one thing to do with the Social Security system. Tariffs are a means to obtain more favorable economic trade deals with other nations. When more favorable economic trade deals are obtained the tariff rate will decrease and the tariff revenue will decrease also.