No, I’m saying 4/100 in equal installments is less costly than 4/100 in payments of 30/30/20/20. It’s a simple present value of money calculation. Same reason the Nats always defer money.
I don't think its correct to say that there is no benefit to front loading a contract just because the luxury tax hit is the same or because 30 million in 2020 is more valuable than 30 million in 2023. For competitive teams who aren't operating near the LT threshold (meaning the AAV-Luxury tax hit rule isn't much of a factor) I think there is a tangible benefit to paying an older player more money earlier and less money later.
But I do understand that from a raw value perspective it doesn't matter. Like, if you save 8 million in value in 2023, that's just 8 million in value that you lost in 2020 by frontloading the contract as opposed to evenly distributing the payout. I get that.
But... if we can absorb the cost of Donaldson at 33 million in year 1, that more or less makes this a complete team that can compete for a WS (minus maybe a RH outfield bat) in 2020, meaning I'd be less concerned about the loss of immediate flexibility. In 2023, we'd be paying Donaldson 15 million (~1.5 win valuation at that time, probably) instead of 25 or 30 million, providing us more flexibility during that year when we may have more needs to address than we do now.
Maybe you're right that a front loaded contract to Donaldson doesn't make sense for a reason I didn't previously consider, but I don't think its correct to say that there is literally never a benefit to frontloading a contract. I may be wrong on that account as well, but intuitively it doesn't feel correct. And it confuses me why other teams would have done it in the past, if there was no perceived benefit in it.
Is there a benefit to backloading a contract, to either team or player? Would a frontloaded contract actually benefit the player, going by the same present money rationale you're using? These are serious questions I'm asking because you're speaking like you have more authoritative knowledge on this than I do. But it feels more contextual than that rather than the universal way you described them. At least to my intuition, it does. But I'm open to changing my mind on that.