There's only one way that reliably works to ensure that everyone, regardless of income or life situation, can get the treatment they need without paying extortionist prices, and that is freely avaliable public healthcare, financed by taxation and administered by the government. No other model works equally well when it comes to supply what everyone, sooner or later, is dependant on.
This can of course be supplemented by private alternatives for those who wish, but they should be alternatives only. The public version should always be well funded and run, so that there will be no need, beyond personal preference, to choose private options.