It is all about the Kleptocracy
An Infrastructure Bank is nothing more than a way to funnel money to Obama's cronies. It will be created in such a way to take power away from democratic institutions and empower unaccountable elites.
If it was just a matter of rebuilding our infrastructure, Obama would create a public works program (which would be popular) and have done with it. This is just a pretext to make his cronies rich.
If you took Bush 43 and gave him brains and a work ethic you would have Vladimir Putin. If you took Putin and gave him looks and charm you would have Obama. Obama is a really horrible president.