and yet again, we see more info on your game which helps show how little strength matters there due to campaign specific parameters.Gold weight is rarely tracked in any game I've seen. You can always exchange for gems or get a pack mule. I have a rogue character I haven't run yet and I just added a bunch of typical gear. He even has an extra set of armor because I forgot to remove a set. He's not encumbered yet.
I don't remember ever seeing an issue unless the PC wears medium armor.
My first level halfling has like 90lbs of get off the bat and thats before moving to decent (heavier) armor or weapons.
After so many ways to devalue strength being chosen by your group, its not surprising it seems underbalanced.