Opinion of the Court
In 1994, the IRS added, specifically, that “compensation” includes “pay for time lost.” §31.3231(e)–1(a)(4); see 59 Fed. Reg. 66188 (1994).
Congress created both the railroad retirement system and the Social Security system during the Great Depression primarily to ensure the financial security of members of the workforce when they reach old age. See Wisconsin Central Ltd. v. United States, 585 U. S. ___, ___ (2018) (slip op., at 1); Helvering v. Davis, 301 U. S. 619, 641 (1937). Given the similarities in timing and purpose of the two programs, it is hardly surprising that their statutory foundations mirror each other. Regarding Social Security, the Federal Insurance Contributions Act (FICA), 26 U. S. C. §3101 et seq., taxes employers and employees to fund benefits, which are distributed pursuant to the Social Security Act (SSA), 49 Stat. 620, as amended, 42 U. S. C. §301 et seq. Tax and benefit amounts are determined by the worker’s “wages,” the Social Security equivalent to “compensation.” See Davis, 301 U. S., at 635–636. Both the FICA and the SSA define “wages” employing language resembling the RRTA and the RRA definitions of “compensation.” “Wages” under the FICA and the SSA mean “all remuneration for employment,” and “employment,” in turn, means “any service, of whatever nature, performed… by an employee.” 26 U. S. C. §3121(a)–(b) (FICA); see 42 U. S. C. §§409(a), 410(a) (SSA). Reading these prescriptions together, the term “wages” encompasses “all remuneration” for “any service, of whatever nature, performed… by an employee.” Ibid.
II
A
To determine whether RRTA-qualifying “compensation” includes an award of damages for lost wages, we begin
