People used to sometimes borrow a portion of their acquisition costs, the leveraged buy-out is a relatively recent phenomenon one that encourages asset stripping and short termism. It's entirely unhelpful to the economy at large not just football and could be stopped by changing the tax laws which were never intended to facilitate such take overs (as Osbourne suggested in fact until his masters twisted his arm).
The purpose of an LBO is to make a large acquisition without having to commit a lot of capital. The acquirers also want to maximize shareholder value by attempting to create a stronger and more profitable combined entity. The buyer needs to ensure that the expected synergies materialize in order to realize financial returns. Today, however, LBOs are increasingly used as a way to make an average company become a great company.
LBO's are generally used to make strategic investments that would result in long term gain. There may be strategic downsizing (lay-off's etc), but these are aimed at making a company profitable over the long haul.
Ofcourse they are a very risky propsition and if handled wrongly would ultimately result in bakruptcy...and this risk is enahnced by an unstable economy...and in our case the recession spelt bad news for our club.
I think you are confusing this with a hostile take over (which overlaps and may form part of an LBO but is not a exact match), where in a big company purchases a small comapany for a tactical advantage, which would be more of a carnivoral approach to this.