[trhway]

the society reneging on its contract today means that the current taxpayers will lose the trust in the society and in particular will be significantly discouraged from paying taxes, etc. as they would lose belief in the society keeping its side of the bargain in the future.

[nradov]

It doesn't matter whether taxpayers are discouraged. Medicare taxes are automatically deducted by employers for most workers.

[trhway]

taxpayers are voters. So it does matter a lot if they are discouraged.