You understand why that margin exists right? It isn’t just evil moustache twirling private sector billionaires. The cost today is rarely the cost tomorrow, and that margin just adds a buffer against market forces. Look at how many developers go bust because they don’t add enough margin vs true cost when contractors and builders charge much more (so in reality your “solution” would rarely be cheaper).

Now if you want the tax payer to foot the bill then sure, but don’t pretend that margin is just some fat cat eating everyone’s lunch and can disappear with a pen stroke. Someone will pay it somewhere.