you really can't, if you want to live in western europe and don't want to do shady stuff, you have to accept the social solidarity system we live in here.

I'm not a lawyer or accountant, and I cant give business or legal advice and the following is "sarcasm" etc etc...

in theory, slovakia, dividend tax for residents is 7%, you don't have to pay social or health deductions when taking out dividends from the company you own. you can employ yourself in said company with base salary and pay minimal deductions from that, the rest you can take out as dividend. your home residence still matters, this means you would also have to live there for majority of the year. otherwise you would have to pay additional deductions and tax in country of your residence austria. this is still somehow considered legal and "perfectly ok" thing to do, i bet they will change that in couple of years due to pressure from the EU. you might be able to effectively pay only up to 20% of your gross this way + you get to business expense.

really, just move to switzerland, at least that's my plan a few years down the road.