Economist: Our country needs as much capital as possible from overseas investors in order to sustain our economy.
Evidence
Our country needs as much capital as possible from overseas investors in order to sustain our economy.
Intermediate Conclusion (Hence)
We cannot afford any reduction in the amount of capital that these investors have invested here.
Main Conclusion (Therefore)
To sustain our economy, we should pass laws making it much more difficult for overseas investors to remove their capital.
Evaluate
There isn't a huge gap in logic between needing as much capital as possible (the evidence) and not wanting any reduction in the existing amount of capital (the intermediate conclusion).
But there is a significant gap between the intermediate conclusion and the main conclusion. Wanting to avoid any reduction in investments does not automatically support the idea that we should pass laws making it more difficult for investors to remove their capital.
This main conclusion is a recommendation. Plans and recommendations tend to be vulnerable to a variety of objections, and the correct answer to a Weaken question might focus on any one of them. It helps to think about the kinds of objections that this argument is particularly vulnerable to.
For example, a recommendation might have the opposite effect. Maybe these laws would discourage investors from making future investments, which would prevent us from acquiring "as much capital as possible." Or there might be some reason why this particular recommendation can't be implemented, or won't be effective. Maybe these types of laws are almost impossible to enforce, and therefore tend to be ineffective.
Goal
Look for an answer that suggests the recommendation might backfire or be impossible to implement correctly. But, since objections can take many forms, read answers with an open mind. We want to notice if one attacks the recommendation in another way.