Depends what you mean by 'the economy' as of course there are very many more than one. There are the booming ones in Asia and the stagnant ones in North America and Europe. Also many micro-economies within those, with successful, growth businesses, and others failing.
Leica prices have always been high, and it does not seem to have held them back too much. As I understand it, the top end Nikon is about the same price as the top end Leica.
If we believe what we read about the difference in wealth between rich and poor ever expanding, then the rich people have even more money now to spend on Leica.
In the UK, while many companies were complaining about the 'difficult economy', and going to the wall, John Lewis, a relatively high end department store, were posting record profits.