Oh yeah the government has given their word.
Have they said what educational infrastructure they will spend it on? No.
Have they said how much they are getting from the sales? No.
Have they said how they will spend the money from the sales to make up for the infrastructure lost in the areas where they have closed the schools? No.
What they have said is: "We are selling your schools, but don't worry trust us with the money we are making from it because we'll spend it on education, but just don't ask us about details".
It's like shutting down Sydney airport and the government saying "oh don't worry about it we will spend the profits on transport".
Yeah I don't think I'll be swallowing that any time soon.
Given they aren't yet sold, I don't think it is possible for them to answer those questions. However I suspect if they don't keep their word, emotionally invested people such as yourself will work to expose any deception.
At this stage there is no reason to believe they won't. The reality is that the funds would be a drop in the ocean of the debt levels.
This is just part of the role of a government. The efficient allocation of scarce resources. Business as usual, but a big impact on those directly affected none the less. For most Qlders it won't rate as a big issue.
And no, it is nothing like the analogy you have suggested. Unless there were hundreds of Sydney Airports that is.