[KeysrSoze]

Marxist? Really? Maybe Stalinist, but from my view it looks more like classical fascism. From wikipedia, characteristics of fascism are
1) a very high degree of nationalism
we all know how how they like to pontificate about how great their Federation is and is the height of human achievement and all. Their prime directive itself views pre-warp societies as primitive and beneath them, deserving no aid.

2) centralized control of private enterprise
Starfleet seems to run everything. They control energy production and land aquisition at least, the only thing that matters in an free-energy economy.

and, after it attains political control of a country, involves 3) a powerful, dictatorial state that views the nation as superior to the individuals or groups composing it.
"The needs of the many outweigh the needs of the few"

It might look Marxist because with anti-matter and replicators theres really no need for hard currency, but the state still sticks its nose in everyones business and controls the capital of the future economy, and it certainly isn't a classless society (even lowly ensigns are gods among men and are shagging Ashley Judd). Anyway, fascism and modern communism are just two sides of the same authoritarian coin.