it got me thinking, that if it ever became policy to donate a % of ones income, that would be my cue to leave. Or I would kick up such a stink about it I would be kicked out.
I understand your reasoning but If you think about it, $10 is a percentage of your income. Not a big percentage but a percentage just the same.
What's the difference if they say that you must donate $10 or that you must donate .05% of your income? It's still a call for mandatory donating. Little by little the religion is evolving into something most JW's wouldn't have accepted had it been presented to them all at once.