It’s a little bit hard to say, as - like you say - the political landscape can fundamentally shift in four years.
That said, I am very much hoping that a labor-derived leader might stand up in the next few years. I’m not aware of one just yet, but that is where I’d look, particularly as automation and concentration of wealth become steadily greater problems.
I think this would be more meaningful if things cash flow and hirelings had any reasonable purpose in 5e. But the reality is most players will have a pretty stable cashflow by level 5, and most campaigns simply don’t have a meaningful role for Hirelings to play.
So like, I could see this being a thing in Waterdeep Dragon Heist, which encourages you to acquire a home base and then take a side in a gang war. One building, 4-5 rooms acting as a bastion for each player? I guess. But it’s essentially making mechanics for something a lot of DMs did already, and a lot of other campaigns simply don’t have a good basis for this.
I’m also kind of underwhelmed by the attacks mechanic. “A random special facility is shut down for your next bastion turn”? So like, I can’t ever actually lose anything I put into the bastion, it just stays there even if I have literally no defenses, the attackers overrun the place, and squat in it for 7 days?