So the family liquidates the business to pay the tax. What just happened? Well, the government took its last pound of flesh but more importantly it killed an entity that would have generated tax revenue for years to come. So who won? Well, nobody. The family loses its business/farm/whatever and the government loses a revenue stream in the quest for a one time pay off.
To add to this under this circumstance there are jobs lost as well putting people out on the street looking for a new one.
Thus less income taxes collected as well and possibly short term unemployment spent.