He means the profitability of these clubs is in danger. That's it. These clubs should not be guaranteed to make massive profits though.
Maybe player salaries need to come down. Maybe super agents need to be eliminated. Maybe it all needs to crumble and be rebuilt differently. But these guys aren't entitled to making massive $$.
With the agents it is simple. All the clubs agree on blacklisting agents demanding exorbitant fees, and it is done. But of course, when you have club execs getting kickbacks and favours from those very agents, it won't happen.