i am singaporean and did the sums on moving back home. My husband is british and a higher rate taxpayer. We have around £150k equity in our flat in London. I enjoy subsidized healthcare (pay for health insurance back in singapore as required of a citizen)
He will take home 30% more even if he got the same salary as the taxes are quite low there. But our flat (in a similar area to our leafy zone 3 suburb) would cost us 60% more in Singapore for the same square footage (tiny 2 bed flat) on the private condo market, thereby doubling our mortgage with the sole upgrade being a tiny swimming pool on the rooftop that you can't even drown a mouse in. We need a hell of a pay raise to even get the same standard of living we have in London housing wise.
Could we opt for hdb (the government housing scheme that 85% of singaporeans live in). Yes I theoretically could buy a hdb under the singapore citizen-foreign spouse scheme but they would only calculate my income under the mortgage affordability and buy under the resale scheme and my DH can't be the legal owner (only the occupier). When my DH gets permanent residency which could take years and has fairly opaque criteria (needs to show commitment to singapore whatever that means), we could then buy hdb normally with both our incomes and both our names. However as we own a flat in London, the rule for HDB is that you have to sell your overseas private property at least 15 months before you buy a hdb flat and they will repossess your flat if they find out you own private property (flat in London also counts as private property even though this rule is actually targeted at richer singaporeans to discourage or delay them from downsizing and increasing prices for the rest; and my london flat is similar to HDB prices than private condo prices).
It would be far far more difficult for 2 expats in Singapore. Unless you are truly earning a lot of money (and the company would have to justify taking you on as many singaporeans are also equally well qualified to do those jobs and also want to), it would not necessarily be an easier life and you will not necessarily have more disposable income. We have fertility problems and even if we had kids, i would have no issue sending them to local schools which most Brits would probably not and also as you are not citizens, you wouldn't get in anyway. My potential child would be a citizen. You have to factor in hefty international school fees into the calculation.
Most low tax jurisdictions are not easy places to live in due to the high costs. Singapore protects its citizens for this reason. the reason why i am not returning is cos i have property in London. If i had been renting in London I would probably have no issue with waiting or tossing the coin on dh getting PR (same deal) and living with parents in the meantime for years as that is probably easier to do than for the average income earner to buy in London.
Most EU countries have higher taxes, America has far higher costs. my SIL in america is working a remote job and can barely afford to live and pay nursery fees even though she is living with her MIL. Higher salary is needed