No Responsibility for Losses
A basic principle of the market economy is that those who make decisions must also bear the consequences of their decisions, in case of both success and failure. Only then can it be guaranteed that the individual's pursuit of wealth does not occur at others' expense.
High income should not be progressively taxed. But losses should also not come at public expense. In recent years, we have become accustomed to seeing the state's job as rescuing large corporations from insolvency. This encourages risky decisionmaking, since in case of success, profits are privatized, but in case of failure, losses are socialized.