Politicians often advocate increased overall economic productivity while ignoring its drawbacks.
Main Conclusion
Politicians often advocate increased overall economic productivity while ignoring its drawbacks.
Evidence
Attempting to increase the productivity of a corporation means attempting to increase its profitability, which typically leads to a reduction in the number of workers employed by that corporation.
Intermediate Conclusion
Attempting to increase productivity in the economy as a whole may benefit business owners, but will increase the number of unemployed workers.
Evaluate
Strictly speaking, the first sentence appears to be the main conclusion of the argument. "For example" is usually a premise indicator, and the example in the second sentence is being offered as evidence supporting the claim in the first sentence. But we also have the conclusion indicator "thus" at the start of the final sentence, indicating that this is a conclusion supported by evidence in the previous sentence. When we compare this final sentence to the first sentence, the final sentence seems like an intermediate conclusion supporting the more general main conclusion in the first sentence.
As we start looking for flaws or gaps in the argument, we should notice a gap in between the evidence and the intermediate conclusion. This seems to be where all of the action is in this argument.
The evidence states that attempting to increase the productivity of a corporation typically leads to a reduction in the number of workers employed by that corporation.
The intermediate conclusion shifts to a claim about attempting to increase productivity in the economy as a whole, stating that this will increase the number of unemployed workers.
How exactly is the example of increasing the productivity of a corporation directly relevant to increasing productivity in the economy as a whole? Corporations do play a role in the economy, but at best there seems to be some type of Part vs. Whole flaw happening here. At worst, the argument hasn't made it at all clear how the evidence is supposed to support the conclusion.
Goal
Look for an answer which highlights the gap between evidence about a corporation and the conclusion about the economy as a whole. There might be other flaws in the argument, and a correct answer could describe one of those flaws, so we'll keep an open mind as we look at the answers. Beware of answers which describe something that doesn't actually happen in the argument.