Conversation so far:
When did Ernie Kovacs exihibt tax evasion?
A frequent critic of the U.S. tax system, Kovacs owed the Internal Revenue Service several hundred thousand dollars in back taxes.
What happened that caused Ernie Kovacs to owe back taxes?
Kovacs owed the Internal Revenue Service several hundred thousand dollars in back taxes, due to his simple refusal to pay the bulk of them.
how much did Ernie Kovacs evade in taxes?
In 1961, Kovacs was served with a $75,000 lien for back taxes.
did Ernie Kovacs go to prison for tax evasion?
Are there any other interesting aspects about the Ernie Kovacs article?
His long battles with the IRS inspired Kovacs to invest his money in a convoluted series of paper corporations.
how did Ernie Kovacs' battles with the IRS affect his career?
His tax woes also affected Kovacs's career.
what did Ernie Kovacs do to pay his debt off?
His tax woes also affected Kovacs's career, forcing him to take any offered work to pay his debt.

Question: What kind of work did he do?
Self-contained rewrite: What kind of work did Ernie Kovacs do?