The park could be completely encompassed by company buildings and the hospital could be located on a remote oil rig. Both could, legally, still be accessible to the general public for use as they please, but due to their concrete nature, the general public is either unaware of it or has few means to use it.
Similarly, the software built by the company-funded tax-exempt ‘charity’ could be constructed in such a way that essentially only the funding company can make use of it.
That’s not to say that accepting others in a hospital on an oil rig is ‘evil‘, it might just not be tax-exempt (assuming that an employees-only hospital wouldn’t be tax-exempt).
Similarly, the software built by the company-funded tax-exempt ‘charity’ could be constructed in such a way that essentially only the funding company can make use of it.
That’s not to say that accepting others in a hospital on an oil rig is ‘evil‘, it might just not be tax-exempt (assuming that an employees-only hospital wouldn’t be tax-exempt).