You're just describing Minnesota retaining money on Orlov and O'Reilly at last year's deadline. Yet more unblocked moves of this intention.
Pass through retention is allowed
im talking of say Matthews was a UFA, Toronto asks team X to sign him for his current contract length/cap and retain $4M+ each year for a 2nd.
Washington traded Oprik iirc to Colorado then they bought him out and he resigned in Washington is not allowed.
pittsburg tried to trade for a player they retained on in the off-season and couldn’t. Trade voided by league.
Similarly if Pittsburgh traded him to team X after last years deadline and tried to reaquire him with retention by next years is deadline isn’t allowed.
it’s the same reason why offer sheets carry a one calendar year NMC
it’s all cap circumvention.