After it was announced that the Medicare Trust Fund would become insolvent around 2026, and the Social Security Trust fund a few years after that, it became impossible for the parties to kick the can down the road any longer. That was of great value to the Democrats, as the GOP was unable to play its cynical and hypocritical game of attacking them for past Medicare cuts, while quietly supporting privatization and massive cuts of their own, during the 2024 campaign. Largely as a result, the Democrats won the election, but their majority was too small to get reforms through Congress without some GOP support.
Seeing an opportunity to kill two birds with one stone, the Democrats proposed a carbon tax to make up the deficit in the two entitlement programs. The GOP was split; the CLs, of course, demanded benefit cuts, while the other factions wanted to keep the current benefit levels in place, but without raising any taxes. When it was all said and done, the two parties compromised in the usual way; benefit levels were maintained simply through payments from general revenues, without raising taxes. The deficit increased substantially once again, interest rates went up, and the economy suffered as a result.