There should be a change in /warp bank that creates a gap between the buy and sell price of gold.
In an economy like meepcraft it's better if we have a clear idea as to what the total capital of the server is, as well as having more meebles out in the open that are easily spendable.
With the /warp bank it's impossible to tally an accurate total of immediate floating currency given that gold is a form of currency which cannot be tallied nor tracked accurately. People generate gold when they mine, and they also get it from the donator signs etc; meebles, while are also created by players, have a quantitative description on a server-scale and can easily be used to determine the strength of the economy, marked by inflation, deflation, stagnation, or stagflation etc.
Having a 50/30 Buy:Sell on gold ingots would make it so people are incentivized to keep their meebles in either items that fluctuate in value OR keep it in floating currency which can easily be transacted or taxed.
This would make a percent tax (or, progressive tax) effectively enforcible in towns, further stimulating the economy.