The most essential part of the scheme is there is a surplus of cash for all the private firms that will be involved.
Once that is sorted out, we can look at what it has to do. Then we can trim that down to ensure there is no danger of it hurting anyones profits (you know, if it turns out it doesn't work then you can't expect the contractor to fix it).
Then halve that functionality (because we all know people want the moon on a stick).
Ensure any timescales are sufficient enough for the money to have long disappeared before anyone realises.
Then you - my friend - have a plan.
I know these seems overly cynical, but I don't think anyone here can appreciate the Herculean effort that goes into ensuring simple effective and cheap solutions are never considered. We call these folk grifters, but boy, do they work for their money.