I am thinking that I might stop watching La Liga in a few years time.?

Your right, both Madrid and Barca are massively financed by the Spanish banks so it makes it nigh on impossible for any smaller clubs to compete, sadly this is happening in the Prem aswell tho, it will always be between 5 or 6 clubs as to who wins the title, and getting into the Champs Leauge is so profitable....look at the transfer market at the moment, theres a huge divide between the haves and have nots