Could the OPM deferred resignation offer be the largest ADA Violation in history?

Edit: ADA: Anti-Deficiency Act.

When I read the article below (especially the excerpt), it struck me that this indeed seems like it could be. Your thoughts?

https://wapo.st/415aiF3

"In addition, the agencies are funded only through March 14, when the government will shut down unless Congress acts to approve new spending.

Promising workers payment through September is a “flat-out violation” of a 19th-century law that prevents the administration from agreeing to spend money it does not have, said David Super, an administrative law professor at Georgetown University."