I guarantee those execs think they will be building Star Trek / Federation level society. But the comment above is right, it will be Cyberpunk just with shittier technologies driven by “the invisible hand of the market” or some other drivel.
They do, they don't inside the federation because it's in practice largely post scarcity. Outside of federation space they use federation credits (likely based on stores of rare hard/impossible to replicate materials) and specifically around ds9 the currency was gold pressed latinum.
Also voyager with replicator rations and Holodeck time.