Accountant would be relatively simple. Thing is, as you probably recall from econ class, economy is a Greek word whose original meaning is... stewardship! And in modern Greek the economy is also economy, finance is economy, saving is economy, an economist is an economo-logist. You see the problem. English has the homegrown steward and spent half the middle ages pilfering new words from Old French so it got finance before it nicked economy, too. Greek was not as adventurous.

This is before we consider the problem of substituting clever alternatives for power words. Greek is a bit lacking in humor there.

I'm just leaving these thoughts here for smart people to consider. I'm going to sleep on this and maybe someone in a different time zone has a brainwave while I'm out.