The fact is that if you took a poll in game to determine what % of people are picking up every single stack of gold... vs those who think it's not worth their time to cut backwards to pick up stacks up to X amt of gold (my own personal number is about 1.2k - anything less, I just keep on moving as it's not worth my time)
I see what u mean, but first we would need to be sure if the player deciding to pick up certain gold drops or not is an intended important mechanic in the decision making , is it intended that players should skip/lose gold ( that are already theirs waiting to be picked up) through a normal run?
If a normal run offers 10 gold drops and player collects them all , the economy shouldnt be punished, if this happens then theres a flaw in the game design and the gold drop quantities arent the adequate, you just shouldnt punish the economy by collecting everything the game rightfully offered to you.
Immo there are some other more important decisions to make in-game and again , pick up radius should be just a commodity, if it turns into a gold disbalance then the problem comes from somwhere else i think.
Increasing radius is only serving 1 purpose: inflating the market with more gold.
Also gold is not the only thing to it , there are other some survival using for PU as listed on the main post, you should revise the suggested solution 0 ( wich we think is the less invasive) to see what u think.