...What matters is who is willing to pay for broadcasting rights (which incomes are channelled to the clubs of course). In case of the Portuguese Superliga, the income through broadcasting rights (and attracted foreign sponsors that would never think about investing in the Eredivisie) is much higher than that of the Dutch Eredivisie. If the Portuguese would even bother to channel those funds in the right directions, they would wipe the floor with us (more so than they currently do

) and easily catch up with the German Bundesliga.
For failing to fulfil precisely that potential, I refer to Portugal as Europe's Inter. Not because their national team keeps failing but because the failing of their national team is related to their failure in fund managing, in marketing of their national league and in training youngsters (and you're not telling me Dutch kids are generally more talented than their Portuguese counterparts).