Empirical evidence suggests that taxes and transfers considerably reduce poverty in most countries, whose welfare states commonly constitute at least a fifth of GDP.
Welfare state - Wikipedia, the free encyclopedia
Absolute poverty measures the number of people living below a certain income threshold or the number of households unable to afford certain basic goods and services.
Relative poverty measures the extent to which a household's financial resources falls below an average income threshold for the economy. Although living standards and real incomes have grown because of higher employment and sustained economic growth over recent years, the gains in income and wealth have been unevenly distributed across the population.
That's a very good track record. Mixed economies with a welfare state ftw.