I was right-leaning when I was young and then I saw where the policies of the last three decades have taken us and I do not like it. I have earned a top-percentile salary in a rich western country and paid lots in income tax, and I would happily give more away to make sure people who make different life choices are taken care of and get more chances in life. The rich need no more money.
Also, what good is it to have a great house, an expensive car, and private tutored kids, if the outside of your house is a slum, the roads are too bad for your car, and your kids risk being kidnapped for ransom any time they go to play outside?
The rich through times always have had the delusion that their wealth will protect them and isolate them from society, with their private armies, private healthcare, private tutors and expensive villas. But if anyone looks at history, it always ends up the same way. Based on that knowledge, it's the rich that should be actively supporting equality and progress in society as if their lives depend on it.
"I just want everything to be the same it is now, except with no government that helps anyone else because I don't want to pay taxes, and I already have everything I need" is a pretty comfortable position. Until, inevitably, people run out of bread, and the guillotines come out.
I'm more than happy to pay my taxes and ensure everybody else has a good life, too. I don't want to find out first-hand how long a head survives without its body still attached to it.