Taxes, even for those high earners, are unchanged on income below those amounts.

@Huy Thai, in my state once the tax basis is established for the year, it seems to apply for that year unchanged.

The existing/recorded title deed will remain unchanged.

But the plan is essentially unchanged since they moved.

Would you say the neighborhood has been getting better, getting worse, or remained unchanged in the last several years?

If it isn't a short sale, your end of the job should remain unchanged.

You may see interest rates remain unchanged but thats not a bad thing. 

North Center down 20%, unchanged, down 40%.  

You'll get some comfort from looking at a graph of historical top tax levels - https://bradfordtaxinstitute.com/Free_Resources/Federal-Income-Tax-Rates.aspxAside from obvious extreme hikes  for WWs 1 and 2 and Korea and Vietnam (seeing a pattern here) and paying for the New Deal in the Great depression - Tax rates haven't changed that much since the tax code went into effect in the early 1900s.Since 1980 ish it's been relatively unchanged around an axis through 3 democratic and 4 republican administrations. 

It is usually written in the lease contract that without the permission of landlord, tenants shall keep things unchanged in the house.