Exactly. Surely the finance industry can come up with a product that automates this so you automatically sell them a tiny slice of your home to make up the property taxes without it affecting your cash flows.

The private finance industry need not be involved.

Just have government allow taxes to be deferred until time of sale with interest pinned to the cost of borrowing for government. That already exists where I live for people over the age of 65. The government can still get the revenue for free via borrowing and the payback is more or less guaranteed.

This really seems like the most fair situation, if we don't want to a) let retired people stop contributing their fair share, b) kick old people out of their lifetime homes during their most vulnerable years.

I believe you can get a reverse mortgage line of credit that allows you to take out money as needed. That is, a reverse mortgage doesn't have to be a predetermined lump sum or monthly payout.

This doesn't totally automate it, but it takes away the need to manage the proceeds from a reverse mortgage between the time you receive a payout and the time you pay your taxes.