香港應否設立最低工資? 的英文

Your sentence is correct!
However, the verb IMPOSE has a meaning of taking advantage of somebody. In this case, we don't see that HK government mean to take unfair advantage from the minimum wage proposal.

Here's my version:
Should Hong Kong government implement minimum wage?
or
Should Hong Kong government establish minimum wage?

2007-12-06 03:01:41 補充：
Please add a preposition (THE) to HK government.