"you'd be adding quite a shocking tax bill to a lot of seniors on fixed incomes" If there are unlikely seniors on fixed incomes with houses worth more than $10

"you'd be adding quite a shocking tax bill to a lot of seniors on fixed incomes" If there are unlikely seniors on fixed incomes with houses worth more than $10M, then they may pay this tax with shares in said house. When their heirs come into possession of that house, they have to buy those shares back. 15 years of tax will be 1,5% market price.