It was not just 2021. After the great Dodger purge (CC, AGon & Beckett,) we did NOT come close to replacing their value, the following ring year- 2013.
Opening Day payrolls:
$168M '10
$164M '11
$175M '12
$154M '13
Yes, 2004's payroll was larger than pre-2004 and 2005-2006.
Yes, 2007 was more than '08 & '09.
Yes, 2018 was more than ever, but it was less than 2019, which was DD's worst year by record.
2013 and 2021 were "low points" in budgets, when compared to surrounding seasons.
When you look at end of year 40 man roster budgets, one thing is common: after each ring year, the budget dropped:
$130>117 "04>'05
$155>147 '07>'08
$176>168 '13>'14
$230>228 '18>'19
(It went up $30M from '21 to '22.)