Man I loved the currency valuation tables of TCS and Striker, SOOOO much twisted fun to be had with the implications. And arguably they aren't steep enough.
The devaluation of a planet's TL and the fiscal implications is a MAJOR storyline IMTU.
Is this an actual TL drop, or the threat of a (possibly false) reduction of the official UWP rating? Either one could be interesting.
MTU has a world that for a brief period punched well above its TL with prototype tech (Collace/District 268), and reverted back because it wasn't sustainable/profitable.
Interestingly, working backward from the TL table in LBB3:'81, the unmodified 1D TL roll for TL13 Collace must have been a 6 (+4 from starport, +1 from atmosphere, +2 from population). This implies that they're at the limits of their ability to advance unless they upgrade the starport -- then they're on the way to TL15 as the improved starport affects their TL.
Even more interesting, nearby TL12 Trexalon had to have rolled a 7!? (Their only DMs are starport +4, Gov't +1.) I'll grant that the wiki description effectively changes the atmosphere from 7 to at best 3, possibly 1, by turning most of it into ice --
but since it's not in the UWP, it shouldn't affect the TL during worldgen*. This suggests that their starport is better than Class B but not quite Class A (giving a +5 DM instead of the +4). Or have I missed something from either the '77 rules or some missing errata?
*This further supports my hypothesis that Trexalon was written as a near-peer competitor for Collace, and had its numbers fudged to make it that way.