It's more like a license than a contract.
> Singapore is more authoritarian than most liberal democracies.
The Singaporean government is a smaller part of life than in most other places. Much less red tape to fill out before you are allowed to do anything and regulations are simpler.
Yes, there are some weird regulations about how you can say things. But they affect the form more than the substance. You are pretty much allowed to say whatever you want, just not however you want it.
Yes, Singapore got lucky in that they had (and have) a hardworking population, and competent leadership.
Why do you insist that Singapore is authoritarian? We have free and fair elections, that are regularly observed to be so by international organisations.
I agree that the laws about homosexuality are weird, but they are also democratic: it's broadly in line with what the population wants as far as I can tell.
Do you chew gum when you are at home in Singapore? No, you don't, because it's illegal. Did you agree to that, were even you given a choice? No, of course not.
Singapore is more authoritarian than most liberal democracies. That means you do as your told. That's the social contract. If you disagree with the people in power to loudly, you got to rot in jail. https://www.smh.com.au/world/lee-kuan-yew-a-towering-figure-...
As it happens, Singapore got lucky. The people in charge are good at running a country efficiently. In particular, they didn't line their own pockets too aggressively - certainly not in a way that was out of line with liberal democracies. The Singapore it's an outlier compared to other authoritarian countries. Generally, once politicians eliminate the competition, they use their control to milk the economy for all they are worth.