Exactly, the reason that technology improvement drives inequality is mainly because fiat money based economy, where you must pay some fiat money in exchange of something else, so the one who creates the fiat money will control all the productivity in the entire country
But even under a gold standard, the market based exchange would still give power to those who can mass produce useful things, eventually those producers will become the super power. Today, those producers are limited by the central bank and government regulators
Technology drives inequality because technological progress is on super-charge. Because too much money is being issued, there are never enough good investments, so all that money is looking for anything that half-resembles a good future business.
The gold standard was only another (earlier) method by the bank-state alliance to prop up the value of paper money and debt with state power.
Only total disengagement of the state from money would represent truly free money.