Large and small manufacturing companies have contracts for orders for months to years out with set prices, some of which might have wiggle room for costs but not to this extent. Plus manufacturing already tries to balance out costs across projects due to fluctuating prices for materials. If their materials double (or more) in price they will be screwed by the contracts and guaranteed to lose money on all of them.

Buying at the current prices means they will have to pay to have the materials stored in a warehouse, which will cut into their planned profits for those existing contracts. Hell, they might be buying at a higher cost than they normally would when fulfilling the contracts.

The company is getting screwed, not trying to fleece customers or their employees.