I think the Pragmatic tree is being overvalued by a lot of people, in particular the Starbase buffs: They aren't worth nearly as much as they appear.
First, the default Constructor you're given is absurdly bloated with unnecessary and expensive modules, and you should never build it---not ever: It comes loaded with six (six!) Life Support Modules, two Hyperdrives (for when you really need that base on the other side of the galaxy), and, for reasons that escape me entirely, Sensors. If you're relying on that monstrosity to build up your Starbases, of course getting three of them for free is going to look like a sweet deal.
Except... Small Hulls can be yours via Orbital Construction only a few short turns after starting the game. Slap a Constructor onto a Small Hull, and you get a ship that's nearly three times faster to build than the default model.
It doesn't move as fast or travel as far, but you don't need it to at the beginning of the game when you're securing local resources---certainly not at such expense. (Sure, if you see a distant resource you absolutely must have, just design another Constructor with an engine---and it'll still be cheaper than the default). Besides, your slower Constructor may arrive at its destination at the same time the faster one would have, because it gets to leave the Shipyard sooner---this has the added benefit of freeing up your Shipyard to start on a new ship.
And later in the game, you can be cranking these Constructors out once per turn, delivering a conga line of upgrades to your Starbases. "Free Constructors" and "Free Starbase Modules" quickly become jokes, compared to the more resilient perks offered by the other ideologies.