Not at all the same thing, Tom. P-R is a legislatively passed excise tax. The proposed tree "tax" is an administratively mandated (well, it was mandated at one point, now it's moot - for the moment anyhow) fee imposed by some wanker in bho' administration and shuffled around to some as-yet unnamed board to dole out. M58 is right, we do have those fees on a lot of commodities, and individually, they don't add up to much. As an aggregate, though, they add up to some serious cash.
Here's how it works: When I bought my pairs (cow plus calf), I paid $1 for every cow and every calf. When I sold the calves to market, I paid another $1 for each calf. When I sold the cows - another $1 each. Assuming the producer who sent the pairs to the sale barn also paid the $1 per, that's starting to add up, all so Sam Elliott can intone - "Beef - it's what's for dinner!". I'm sure there are a lot of .gov bureaucrats who have to be paid as well to "manage" the money collected and distributed.
BTW, want to opt out? No can do, chum, the fix is in. The only way around that is private sales and that is a tough go, labor intensive and not always successful.