You're half right... currently benefits paid exceed taxes collected... but taxes collected plus interest income exceed benefits paid... all per the 2017 Trust Fund Report Summary at
https://www.ssa.gov/oact/TRSUM/index.html
All that matters is cash flow. SS benefits cannot be paid from “interest” which is just an accounting entry in the Trust Fund.
The federal government understands that the Social Security Trust Fund cannot pay benefits.
From page 385 of the Analytical Perspectives section of President Obama’s FY2017 budget, prepared on February 9, 2016 by Obama’s Office of Management and Budget:
“When trust fund holdings are redeemed to fund the payment of benefits, the Department of the Treasury finances the expenditure in the same way as any other Federal expenditure—by using current receipts if the unified budget is in surplus or by borrowing from the public if it is in deficit. Therefore, the existence of large trust fund balances, while representing a legal claim on the Treasury, does not, by itself, determine the Government’s ability to pay benefits.”
https://www.govinfo.gov/features/featured-content/Budget-FY2017
Again, the only thing that really matters is where the cash comes from to pay SS benefits.
The special purpose securities held in the Trust Fund are IOU’s. Those IOUs were generated in two ways:
1. Surplus FICA collections from prior years;
2. An accounting entry labelled “interest earned” which is the T Bill rate times the average balance in the Trust Fund account.
But those special purpose securities (SPS) cannot pay SS benefits. SS beneficiaries want cash.
You should be able to understand why the Trust Fund is meaningless if you look at how benefits would be paid if it did not exist:
1. If the Trust Fund exists:
a. Treasury pays some SS benefits using FICA taxes;
b. SS sends SPS to Treasury in the amount of the shortfall;
c.Treasury borrows from the public in the amount of the shortfall and pays remaining benefits.
2. If the Trust Fund did not exist:
a. Treasury pays some SS benefits using FICA taxes;
b.
c.Treasury borrows from the public in the amount of the shortfall and pays remaining benefits.
The Special Purpose Securities (SPS) are meaningless.