Not quite following your point? What about that is a lie?
At the beginning of The Church of Jesus Christ, saints were asked to consecrate all that they had to the bishop. Legally they signed away all rights to their property and the bishop leased it back to them.
They found that that wasn't sustainable (due to debts and disputes) and switched to 10% of interest (see Section 119 in D&C, https://www.churchofjesuschrist.org/study/scriptures/dc-test...). While tithing was paid in the past with animals, food, etc, that just doesn't scale beyond local communities.
Yes, our church does use funds for advocacy, but it's hard to ascribe pure malice to a church that spends $1 billion annually on humanitarian aid every year, and is expanding affordable education to tens of thousands of people in developing countries.
Not all of us agree with how much money is being held in reserve, but it's important to understand that we don't have a testimony in the church because of what we get from it, or even agree with all policies, but rather because of a personal witness of its truth. It is true that some stay in our church because of social pressure, and I'm not going to defend that practice. But, that's not what our core doctrine teaches.
I understand that it's easy to think that we are all a homogenous group that all thinks the same, but peek under the surface and you'll find many of us who find the core doctrine so compelling that we are willing to stick with the church and to enact change in constructive instead of destructive ways.