You are mixing apples and oranges. SS is NOT on funded by the Federal Income Tax, the SS deficit can be, but SS currently is a standalone program. Unless SS is fixed we will only receive 70% of promised benefits after 2033. There are only a few ways to fix SS, one is raising the cap, another is means testing, and a 3rd is having the Federal Budget cover the shortfall.
If as you say above Elon and Vivek can cut a $trillion or $2trillion from the Budget then the SS shortfall can be covered by cutting spending. SS is NOT a Ponzi scheme, it works, there is no other program to give seniors a pension, we paid into SS all our working lives, there is NFW you can stop it, its the "3rd rail" of politics.