Which should be bringing money into Lisbon to the net benefit of all people living there. If most of the theme park money isn't staying in Portugal then they should pass some legislation to favor the local economy.
That's a tough sell for, say, a barman whose landlord realises they can double their rental income by doing short-term lets. Just because there's suddenly a lot of money flowing in, doesn't mean all people immediately benefit (or even eventually benefit), and in the meantime those who already lived there suffer an explosion in prices for renting and buying property.
They don't just destroy the local economy. They also destroy trust in politics - always fragile at best - and hugely increase the odds of a racist/fascist government.
We've already seen this in the UK, where a drum beat of race hate aimed at immigrants and refugees has been used to misdirect the population away from neoliberal austerity and "low tax, small government" (big profit) policies.
Which - not coincidentally - include a huge amount of literal rent seeking and property profiteering.
