Why doesn't Google Analytics consider goal value in the Traffic Sources - Channels report?

Question

Google Analytics

E-commerce is set up: We count transactions by clicking on the "checkout" button (the first step of the cart). Counting transactions and the amount goes fine. We cannot count transactions on the "Thank you for the order" page due to the current business model (passport verification, card entry, etc.)
Created Goal 14: Clicking on the Checkout button: 1 cart step. The goal count is counted, but the sum (goal value) is not counted. Therefore, we cannot understand the current revenue in the context of channels