Personally I'm against it. Taking on extra targets for next plan so we have more PS so we don't need to take on more targets for next plan seems kinda self defeating to me...
There are a few big catches there.
1) Because Seo has a mechanic where he can trade Political Support for glorious mad science, science we may never get a chance to do again after 2065 when he leaves office, we can use a
lot of banked Political Support.
2) We may be able to get Political Support for doing things we really ought to do anyway, or would want to do anyway. For instance, the Navy might say "I will give you +5 PS if you promise to build the Seattle frigate yard, research the
Governor-A redesign, do the
Infernium Laser Refits for us, and complete two phases of
Railgun Munitions by 2063Q4." All of those are things we would want to do anyway for the sake of having a military capable of handling Karachi, so we might as well get some respect for it.
3) To some extent, by using Political Support as a medium of exchange, we may be able to use Plan goals we
want* to avoid Plan goals we
don't want.** That'd be nice.
*(Say, "expand the community college system for the new refugees so they can get technical training")
**(Say, "stack up another literal trillion cans of beans in the food stockpiles instead of concentrating on improving average food quality, then make surprised Pikachu faces when the Milk and Honey movement hulks out during the 2064 elections and starts smashing things because we were busy doing
that with all our Agriculture dice.")